Greco-Bactrian Kingdom

The Greco-Bactrian Kingdom was a Greek state of the Hellenistic period   located in Central Asia. Along with the Indo-Greek Kingdom in the Indian subcontinent, it was the easternmost part of the Hellenistic world. The kingdom was founded c. 256 BC by the Seleucid satrap Diodotus I Soter and lasted until its fall c. 120 BC. It was ruled by the Diodotid dynasty, Euthydemid dynasty, and the Eucratid dynasty.

The Greco-Bactrian Kingdom covered much of present-day Afghanistan, Uzbekistan, Tajikistan, and Turkmenistan, and some parts of Kazakhstan, Pakistan and Iran. An extension further east, with military campaigns and settlements, may have reached the borders of the Qin State in 230 BC. Its cities were among the largest and richest of antiquity; indeed, Bactria was known as the "land of a thousand cities."

Origins
Bactria was inhabited by Greek settlers since the time of Darius I, when the entire population of Barca, in Cyrenaica, was deported to the region for refusing to surrender assassins. Greek influence increased under Xerxes I, after the descendants of Greek priests who had once lived near Didyma (western Asia Minor) were forcibly relocated in Bactria, and later on with other exiled Greeks, most of them prisoners of war. Greeks communities and language were already common in the area by the time that Alexander the Great conquered Bactria in 328 BC.

Independence and Diodotid dynasty
Diodotus, the satrap of Bactria (and probably the surrounding provinces) founded the Greco-Bactrian Kingdom when he seceded from the Seleucid Empire around 250 BC and became Basileus, or king Diodotus I of Bactria. The preserved ancient sources (see below) are somewhat contradictory, and the exact date of Bactrian independence has not been settled. Somewhat simplified, there is a high chronology (c. 255 BC) and a low chronology (c. 246 BC) for Diodotus' secession. The high chronology has the advantage of explaining why the Seleucid king Antiochus II issued very few coins in Bactria, as Diodotus would have become independent there early in Antiochus' reign. On the other hand, the low chronology, from the mid-240s BC, has the advantage of connecting the secession of Diodotus I with the Third Syrian War, a catastrophic conflict for the Seleucid Empire. "Diodotus, the governor of the thousand cities of Bactria (Theodotus, mille urbium Bactrianarum praefectus), defected and proclaimed himself king; all the other people of the Orient followed his example and seceded from the Macedonians."

The new kingdom, highly urbanized and considered one of the richest of the Orient (opulentissimum illud mille urbium Bactrianum imperium "The extremely prosperous Bactrian empire of the thousand cities", according to the historian Justin ), was to further grow in power and engage in territorial expansion to the east and the west:

"The Greeks who caused Bactria to revolt grew so powerful on account of the fertility of the country that they became masters, not only of Ariana, but also of India, as Apollodorus of Artemita says: and more tribes were subdued by them than by Alexander… Their cities were Bactra (also called Zariaspa, through which flows a river bearing the same name and emptying into the Oxus), and Darapsa, and several others. Among these was Eucratidia, which was named after its ruler."

In 247 BC, the Ptolemaic empire (the Greek rulers of Egypt following the death of Alexander the Great) captured the Seleucid capital, Antioch. In the resulting power vacuum, Andragoras, the Seleucid satrap of Parthia, proclaimed independence from the Seleucids, declaring himself king. A decade later, he was defeated and killed by Arsaces of Parthia, leading to the rise of a Parthian Empire. This cut Bactria off from contact with the Greek world. Overland trade continued at a reduced rate, while sea trade between Greek Egypt and Bactria developed.

Diodotus was succeeded by his son Diodotus II, who allied himself with the Parthian Arsaces in his fight against Seleucus II: "Soon after, relieved by the death of Diodotus, Arsaces made peace and concluded an alliance with his son, also by the name of Diodotus; some time later he fought against Seleucos who came to punish the rebels, and he prevailed: the Parthians celebrated this day as the one that marked the beginning of their freedom."

Euthydemid dynasty and Seleucid invasion
Euthydemus, an Ionian Greek from Magnesia according to Polybius, and possibly satrap of Sogdiana, overthrew the dynasty of Diodotus II around 230–220 BC and started his own dynasty. Euthydemus's control extended to Sogdiana, going beyond the city of Alexandria Eschate founded by Alexander the Great in Ferghana:

"And they also held Sogdiana, situated above Bactriana towards the east between the Oxus River, which forms the boundary between the Bactrians and the Sogdians, and the Iaxartes River. And the Iaxartes forms also the boundary between the Sogdians and the nomads." Euthydemus was attacked by the Seleucid ruler Antiochus III around 210 BC. Although he commanded 10,000 horsemen, Euthydemus initially lost a battle on the Arius and had to retreat. He then successfully resisted a three-year siege in the fortified city of Bactra, before Antiochus finally decided to recognize the new ruler, and to offer one of his daughters to Euthydemus's son Demetrius around 206 BC. Classical accounts also relate that Euthydemus negotiated peace with Antiochus III by suggesting that he deserved credit for overthrowing the original rebel Diodotus and that he was protecting Central Asia from nomadic invasions thanks to his defensive efforts: "... for if he did not yield to this demand, neither of them would be safe: Seeing that great hordes of Nomads were close at hand, who were a danger to both; and that if they admitted them into the country, it would certainly be utterly barbarised."

In an inscription found in the Kuliab area of Tajikistan, in eastern Greco-Bactria, and dated to 200–195 BC, a Greek by the name of Heliodotus, dedicating a fire altar to Hestia, mentions Euthydemus as the greatest of all kings, and his son Demetrius I as "Demetrios Kallinikos", meaning "Demetrius the Glorious Conqueror":

Following the departure of the Seleucid army, the Bactrian kingdom seems to have expanded. In the west, areas in north-eastern Iran may have been absorbed, possibly as far as into Parthia, whose ruler had been defeated by Antiochus the Great. These territories possibly are identical with the Bactrian satrapies of Tapuria and Traxiane.

Expansion into the Indian subcontinent (around 180 BC)
Demetrius, the son of Euthydemus, started an invasion of the subcontinent just before 180 BC, a few years after the Mauryan empire had been overthrown by the Shunga dynasty. Historians differ on the motivations behind the invasion. Some historians suggest that the invasion of the subcontinent was intended to show their support for the Mauryan empire, and to protect the Buddhist faith from the religious persecutions of the Shungas as alleged by Buddhist scriptures (Tarn). Other historians have argued however that the accounts of these persecutions have been exaggerated (Thapar, Lamotte).

Demetrius may have been as far as the imperial capital Pataliputra in today's eastern India (today Patna). However, these campaigns are typically attributed to Menander. The invasion was completed by 175 BC. This established in the northwestern Indian Subcontinent what is called the Indo-Greek Kingdom, which lasted for almost two centuries until around 10 AD. The Buddhist faith flourished under the Indo-Greek kings, foremost among them Menander I. It was also a period of great cultural syncretism, exemplified by the development of Greco-Buddhism. <!-- The Indo-Greek Kingdom or Graeco-Indian Kingdom[1] covered various parts of the northwest regions of the Indian subcontinent during the last two centuries BC, and was ruled by more than 30 Hellenistic kings,[2] often in conflict with each other. The kingdom was founded when the Graeco-Bactrian king Demetrius invaded India early in the 2nd century BC; in this context the boundary of "India" is the Hindu Kush. The Greeks in India were eventually divided from the Graeco-Bactrian Kingdom centered in Bactria (now the border between Afghanistan and Uzbekistan).

The expression "Indo-Greek Kingdom" loosely describes a number of various dynastic polities. There were numerous cities, such as Taxila,[3] (now in Punjab (Pakistan)), Pushkalavati and Sagala.[4] These cities would house a number of dynasties in their times, and based on Ptolemy's Geographia and the nomenclature of later kings, a certain Theophila in the south was also probably a satrapal or royal seat at some point.

During the two centuries of their rule, the Indo-Greek kings combined the Greek and Indian languages and symbols, as seen on their coins, and blended ancient Greek, Hindu and Buddhist religious practices, as seen in the archaeological remains of their cities and in the indications of their support of Buddhism, pointing to a rich fusion of Indian and Hellenistic influences.[5] The diffusion of Indo-Greek culture had consequences which are still felt today, particularly through the influence of Greco-Buddhist art.[6]

The Indo-Greeks ultimately disappeared as a political entity around AD 10 following the invasions of the Indo-Scythians, although pockets of Greek populations probably remained for several centuries longer under the subsequent rule of the Indo-Parthians and Kushans.

Nature and quality of the sources
Some narrative history has survived for most of the Hellenistic world, at least of the kings and the wars;[39] this is lacking for India. The main Greco-Roman source on the Indo-Greeks is Justin, who wrote an anthology drawn from the Roman historian Pompeius Trogus, who in turn wrote, from Greek sources, at the time of Augustus Caesar.[40] Justin tells the parts of Trogus' history he finds particularly interesting at some length; he connects them by short and simplified summaries of the rest of the material. In the process he has left 85% to 90% of Trogus out; and his summaries are held together by phrases like "meanwhile" (eodem tempore) and "thereafter" (deinde), which he uses very loosely. Where Justin covers periods for which there are other and better sources, he has occasionally made provable mistakes. As Develin, the recent annotator of Justin, and Tarn both point out, Justin is not trying to write history in our sense of the word; he is collecting instructive moral anecdotes.[41] Justin does find the customs and growth of the Parthians, which were covered in Trogus' 41st book, quite interesting, and discusses them at length; in the process, he mentions four of the kings of Bactria and one Greek king of India.[42]

In addition to these dozen sentences, the geographer Strabo mentions India a few times in the course of his long dispute with Eratosthenes about the shape of Eurasia. Most of these are purely geographical claims, but he does mention that Eratosthenes' sources say that some of the Greek kings conquered further than Alexander; Strabo does not believe them on this, but modern historians do; nor does he believe that Menander and Demetrius son of Euthydemus conquered more tribes than Alexander[43] There is half a story about Menander in one of the books of Polybius which has not come down to us intact.[44]

There are Indian literary sources, ranging from the Milinda Panha, a dialogue between a Buddhist sage Nagasena and King Menander I, which includes some incidental information on Menander's biography and the geography and institutions of his kingdom, down to a sentence about Menander (presumably the same Menander) and his attack on Pataliputra which happens to have survived as a standard example in grammar texts; none is a narrative history. Names in these sources are consistently Indianized, and there is some dispute whether, for example, Dharmamitra represents "Demetrius" or is an Indian prince with that name. There was also a Chinese expedition to Bactria by Chang-k'ien under the Emperor Wu of Han, recorded in the Records of the Grand Historian and Book of the Former Han, with additional evidence in the Book of the Later Han; the identification of places and peoples behind transcriptions into Chinese is difficult, and several alternate interpretations have been proposed.[45]

There is also significant archaeological evidence, including some epigraphic evidence, for the Indo-Greek kings, such as the mention of the "Yavana" embassy of king Antialcidas on the Heliodorus pillar in Vidisha,[46] primarily in Indic languages, which has the same problems with names as the Indic literary evidence. But the chief archaeological evidence is the coins.

There are coin finds of several dozen Indo-Greek rulers in India; exactly how many is complicated to determine, because the Greeks did not number their kings, and the eastern Greeks did not date their coins. For example, there are a substantial number of coin finds for a King Demetrius, but authors have postulated one, two, or three Demetriuses, and the same coins have been identified by different enquirers as describing Demetrius I, Demetrius II, or Demetrius III.[47] The following deductions have been made from coins, in addition to mere existence:

Kings who left many coins reigned long and prosperously. Hoards which contain many coins of the same king come from his realm. Kings who use the same iconography are friendly, and may well be from the same family, If a king overstrikes another king's coins, this is an important evidence to show that the overstriker reigned after the overstruck. Overstrikes may indicate that the two kings were enemies.

Indo-Greek coins, like other Hellenistic coins, have monograms in addition to their inscriptions. These are generally held to indicate a mint official; therefore, if two kings issue coins with the same monogram, they reigned in the same area, and if not immediately following one another, have no long interval between them. All of these arguments are arguments of probability, and have exceptions; one of Menander's coins was found in Wales.

The exact time and progression of the Bactrian expansion into India is difficult to ascertain, but ancient authors name Demetrius, Apollodotus, and Menander as conquerors.[48]


 * Demetrius

Demetrius I was the son of Euthydemus I of Bactria; there is an inscription from his father's reign already officially hailing him as victorious. He also has one of the few absolute dates in Indo-Greek history: after his father held off Antiochus III for two years, 208–6 BC, the peace treaty included the offer of a marriage between Demetrius and Antiochus' daughter.[50] Coins of Demetrius I have been found in Arachosia and in the Kabul Valley; the latter would be the first entry of the Greeks into India, as they defined it. There is also literary evidence for a campaign eastward against the Seres and the Phryni; but the order and dating of these conquests is uncertain.[51] Demetrius I seems to have conquered the Kabul valley, Arachosia and perhaps Gandhara;[52] he struck no Indian coins, so either his conquests did not penetrate that far into India or he died before he could consolidate them. On his coins, Demetrius I always carries the elephant-helmet worn by Alexander, which seems to be a token of his Indian conquests.[53] Bopearachchi believes that Demetrius received the title of "King of India" following his victories south of the Hindu Kush.[54] He was also given, though perhaps only posthumously, the title ανικητος ("Anicetos", lit. Invincible) a cult title of Heracles, which Alexander had assumed; the later Indo-Greek kings Lysias, Philoxenus, and Artemidorus also took it.[55] Finally, Demetrius may have been the founder of a newly discovered Greek Era, starting in 186/5 BC.[56]


 * After Demetrius I

After the death of Demetrius, the Bactrian kings Pantaleon and Agathocles struck the first bilingual coins with Indian inscriptions found as far east as Taxila[60] so in their time (c. 185–170 BC) the Bactrian kingdom seems to have included Gandhara.[61] Several Bactrian kings followed after Demetrius' death, and it seems likely that the civil wars between them made it possible for Apollodotus I (from c. 180–175 BC) to make himself independent as the first proper Indo-Greek king (who did not rule from Bactria). Large numbers of his coins have been found in India, and he seems to have reigned in Gandhara as well as western Punjab. Apollodotus I was succeeded by or ruled alongside Antimachus II, likely the son of the Bactrian king Antimachus I.[62]

The next important Indo-Greek king was Menander (from c. 165–155 BC) whose coins are frequently found even in eastern Punjab. Menander seems to have begun a second wave of conquests, and since he already ruled in India, it seems likely that the easternmost conquests were made by him.[63]

According to Apollodorus of Artemita, quoted by Strabo, the Indo-Greek territory for a while included the Indian coastal provinces of Sindh and possibly Gujarat.[64] With archaeological methods, the Indo-Greek territory can however only be confirmed from the Kabul Valley to the eastern Punjab, so Greek presence outside was probably short-lived or less significant.

Some sources also claim that the Indo-Greeks may have reached the Shunga capital Pataliputra in northeastern India.[65] However, the nature of this expedition is a matter of controversy. One theory is that Indo-Greeks were invited to join a raid led by local Indian kings down the Ganges river. The other is that it was a campaign likely made by Menander. Irrespective it appears that Pataliputra, if at all captured, was not held for long as the expedition was forced to retreat, probably due to wars in their own territories.[66] Menander's reign saw the end of the Indo-Greek expansion.

The first conquestsGreek presence in Arachosia, where Greek populations had been living since before the acquisition of the territory by Chandragupta from Seleucus is mentioned by Isidore of Charax. He describes Greek cities there, one of them called Demetrias, probably in honour of the conqueror Demetrius.[67]

Apollodotus I (and Menander I) were mentioned by Pompejus Trogus as important Indo-Greek kings.[68] It is theorized that Greek advances temporarily went as far as the Shunga capital Pataliputra (today Patna) in eastern India. Senior considers that these conquests can only refer to Menander:[69] Against this, John Mitchener considers that the Greeks probably raided the Indian capital of Pataliputra during the time of Demetrius,[70] though Mitchener's analysis is not based on numismatic evidence.

"Of the eastern parts of India, then, there have become known to us all those parts which lie this side of the Hypanis, and also any parts beyond the Hypanis of which an account has been added by those who, after Alexander, advanced beyond the Hypanis, to the Ganges and Pataliputra." —Strabo, 15-1-27[71] The seriousness of the attack is in some doubt: Menander may merely have joined a raid led by Indian Kings down the Ganges,[72] as Indo-Greek presence has not been confirmed this far east.

To the south, the Greeks may have occupied the areas of the Sindh and Gujarat, including the strategic harbour of Barygaza (Bharuch),[73] conquests also attested by coins dating from the Indo-Greek ruler Apollodotus I and by several ancient writers (Strabo 11; Periplus of the Erythraean Sea, Chap. 41/47):[74]

"The Greeks ... took possession, not only of Patalena, but also, on the rest of the coast, of what is called the kingdom of Saraostus and Sigerdis." —Strabo 11.11.1[75] Narain however dismisses the account of the Periplus as "just a sailor's story", and holds that coin finds are not necessarily indicators of occupation.[77] Coin hoards suggest that in Central India, the area of Malwa may also have been conquered.[78]

Various Indian records describe Yavana attacks on Mathura, Panchala, Saketa, and Pataliputra. The term Yavana is thought to be a transliteration of "Ionians" and is known to have designated Hellenistic Greeks (starting with the Edicts of Ashoka, where Ashoka writes about "the Yavana king Antiochus"),[79] but may have sometimes referred to other foreigners as well after the 1st century AD.[80]

Patanjali, a grammarian and commentator on Pāṇini around 150 BC, describes in the Mahābhāsya, the invasion in two examples using the imperfect tense of Sanskrit, denoting a recent event:[81][82]

"Arunad Yavanah Sāketam" ("The Yavanas (Greeks) were besieging Saketa") "Arunad Yavano Madhyamikām" ("The Yavanas were besieging Madhyamika" (the "Middle country")). Also the Brahmanical text of the Yuga Purana, which describes Indian historical events in the form of a prophecy, but is thought to be likely historical,[83][84][85] relates the attack of the Indo-Greeks on the capital Pataliputra,[86] a magnificent fortified city with 570 towers and 64 gates according to Megasthenes,[87] and describes the ultimate destruction of the city's walls:[88]

"Then, after having approached Saketa together with the Panchalas and the Mathuras, the Yavanas, valiant in battle, will reach Kusumadhvaja ("The town of the flower-standard", Pataliputra). Then, once Puspapura (another name of Pataliputra) has been reached and its celebrated mud-walls cast down, all the realm will be in disorder." —Yuga Purana, Paragraph 47–48, quoted in Mitchener, The Yuga Purana, 2002 edition Earlier authors such as Tarn have suggested that the raid on Pataliputra was made by Demetrius.[89] According to Mitchener, the Hathigumpha inscription indicates the presence of the Greeks led by a "Demetrius" in eastern India (Magadha) during the 1st century BC,[90] although this interpretation was previously disputed by Narain.[91] But while this inscription may be interpreted as an indication that Demetrius I was the king who made conquests in Punjab, it is still true that he never issued any Indian coins, and the restoration of his name in Kharosthi on the Hathigumpha inscription: Di-Mi-Ta, has been doubted.[92] The "Di" is a reconstruction, and it may be noted that the name of another Indo-Greek king, Amyntas, is spelt A-Mi-Ta in Kharosthi and may fit in.

Therefore, Menander remains the likeliest candidate for any advance east of Punjab.


 * Consolidation

The important Bactrian king Eucratides seems to have attacked the Indo-Greek kingdom during the mid 2nd century BC. A Demetrius, called "King of the Indians", seems to have confronted Eucratides in a four month siege, reported by Justin, but he ultimately lost.[93]

In any case, Eucratides seems to have occupied territory as far as the Indus, between ca. 170 BC and 150 BC.[94] His advances were ultimately checked by the Indo-Greek king Menander I,[95]

Menander is considered to have been probably the most successful Indo-Greek king, and the conqueror of the largest territory.[96] The finds of his coins are the most numerous and the most widespread of all the Indo-Greek kings. Menander is also remembered in Buddhist literature, where he called Milinda, and is described in the Milinda Panha as a convert to Buddhism:[97] he became an arhat[98] whose relics were enshrined in a manner reminiscent of the Buddha.[99][100] He also introduced a new coin type, with Athena Alkidemos ("Protector of the people") on the reverse, which was adopted by most of his successors in the East.[101]

From the mid-2nd century BC, the Scythians and then the Yuezhi, following a long migration from the border of China, started to invade Bactria from the north.[102] Around 130 BC the last Greco-Bactrian king Heliocles was probably killed during the invasion and the Greco-Bactrian kingdom proper ceased to exist. The Parthians also probably played a role in the downfall of the Bactrian kingdom.
 * Fall of Bactria and death of Menander

The Indo-Greek states, shielded by the Hindu Kush range, were saved from the invasions, but the civil wars which had weakened the Greeks continued. Menander I died around the same time, and even though the king himself seems to have been popular among his subjects, his dynasty was at least partially dethroned (see discussion under Menander I). Probable members of the dynasty of Menander include the ruling queen Agathokleia, her son Strato I, and Nicias, though it is uncertain whether they ruled directly after Menander.[103] Other kings emerged, usually in the western part of the Indo-Greek realm, such as Zoilos I, Lysias, Antialcidas and Philoxenos.[104] These rulers may have been relatives of either the Eucratid or the Euthydemid dynasties. The names of later kings were often new (members of Hellenistic dynasties usually inherited family names) but old reverses and titles were frequently repeated by the later rulers.

While all Indo-Greek kings after Apollodotus I mainly issued bilingual (Greek and Kharoshti) coins for circulation in their own territories, several of them also struck rare Greek coins which have been found in Bactria. The later kings probably struck these coins as some kind of payment to the Scythian or Yuezhi tribes who now ruled there, though if as tribute or payment for mercenaries remains unknown.[105] For some decades after the Bactrian invasion, relationships seem to have been peaceful between the Indo-Greeks and these relatively hellenised nomad tribes.

There are however no historical recordings of events in the Indo-Greek kingdom after Menander's death around 130 BC, since the Indo-Greeks had now become very isolated from the rest of the Graeco-Roman world. The later history of the Indo-Greek states, which lasted to around the shift BC/AD, is reconstructed almost entirely from archaeological and numismatical analyses.[106]

Throughout the 1st century BC, the Indo-Greeks progressively lost ground to the Indians in the east, and the Scythians, the Yuezhi, and the Parthians in the West. About 20 Indo-Greek king are known during this period,[107] down to the last known Indo-Greek ruler, a king named Strato II, who ruled in the Punjab region until around 55 BC.[108] Other sources, however, place the end of Strato II's reign as late as AD 10 – see below in the list of coins.
 * Later History

The Indo-Greeks may have ruled as far as the area of Mathura until the 1st century BC: the Maghera inscription, from a village near Mathura, records the dedication of a well "in the one hundred and sixteenth year of the reign of the Yavanas", which could be as late as 70 BC.[109] Soon however Indian kings recovered the area of Mathura and south-eastern Punjab, west of the Yamuna River, and started to mint their own coins. The Arjunayanas (area of Mathura) and Yaudheyas mention military victories on their coins ("Victory of the Arjunayanas", "Victory of the Yaudheyas"). During the 1st century BC, the Trigartas, Audumbaras[110] and finally the Kunindas[111] also started to mint their own coins, usually in a style highly reminiscent of Indo-Greek coinage.[112][113][114][115]
 * Loss of Eastern territories (circa 100 BC)

The Western king Philoxenus briefly occupied the whole remaining Greek territory from the Paropamisadae to Western Punjab between 100 to 95 BC, after what the territories fragmented again. The western kings regained their territory as far west as Arachosia, and eastern kings continued to rule on and off until the beginning of our era.


 * Scythian invasions (80 BC – 20 AD)

Around 80 BC, an Indo-Scythian king named Maues, possibly a general in the service of the Indo-Greeks, ruled for a few years in northwestern India before the Indo-Greeks again took control. He seems to have been married to an Indo-Greek princess.[116] King Hippostratos (65–55 BC) seems to have been one of the most successful subsequent Indo-Greek kings until he lost to the Indo-Scythian Azes I, who established an Indo-Scythian dynasty.[117] Various coins seem to suggest that some sort of alliance may have taken place between the Indo-Greeks and the Scythians.[118]

Although the Indo-Scythians clearly ruled militarily and politically, they remained surprisingly respectful of Greek and Indian cultures. Their coins were minted in Greek mints, continued using proper Greek and Kharoshthi legends, and incorporated depictions of Greek deities, particularly Zeus.[119] The Mathura lion capital inscription attests that they adopted the Buddhist faith, as do the depictions of deities forming the vitarka mudra on their coins. Greek communities, far from being exterminated, probably persisted under Indo-Scythian rule. There is a possibility that a fusion, rather than a confrontation, occurred between the Greeks and the Indo-Scythians: in a recently published coin, Artemidoros presents himself as "son of Maues",[120] and the Buner reliefs show Indo-Greeks and Indo-Scythians reveling in a Buddhist context.

The Indo-Greeks continued to rule a territory in the eastern Punjab, until the kingdom of the last Indo-Greek king Strato was taken over by the Indo-Scythian ruler Rajuvula around 10 AD.[121]


 * Western Yuezhi or Saka expansion (70 BC-)

Around eight "western" Indo-Greek kings are known; most of them are distinguished by their issues of Attic coins for circulation in the neighbouring.

One of the last important kings in the Paropamisadae was Hermaeus, who ruled until around 80 BC; soon after his death the Yuezhi or Sakas took over his areas from neighbouring Bactria. When Hermaeus is depicted on his coins riding a horse, he is equipped with the recurve bow and bow-case of the steppes and RC Senior believes him to be of partly nomad origin. The later king Hippostratus may however also have held territories in the Paropamisadae.

After the death of Hermaeus, the Yuezhi or Saka nomads became the new rulers of the Paropamisadae, and minted vast quantities of posthumous issues of Hermaeus up to around 40 AD, when they blend with the coinage of the Kushan king Kujula Kadphises.[122] The first documented Yuezhi prince, Sapadbizes, ruled around 20 BC, and minted in Greek and in the same style as the western Indo-Greek kings, probably depending on Greek mints and celators.

The last known mention of an Indo-Greek ruler is suggested by an inscription on a signet ring of the 1st century AD in the name of a king Theodamas, from the Bajaur area of Gandhara, in modern Pakistan. No coins of him are known, but the signet bears in kharoshthi script the inscription "Su Theodamasa", "Su" being explained as the Greek transliteration of the ubiquitous Kushan royal title "Shau" ("Shah", "King").[123]


 * Ideology

Buddhism flourished under the Indo-Greek kings, and their rule, especially that of Menander, has been remembered as benevolent. It has been suggested, although direct evidence is lacking, that their invasion of India was intended to show their support for the Mauryan empire which may have had a long history of marital alliances,[124] exchange of presents,[125] demonstrations of friendship,[126] exchange of ambassadors[127] and religious missions[128] with the Greeks. The historian Diodorus even wrote that the king of Pataliputra had "great love for the Greeks".[129][130]

The Greek expansion into Indian territory may have been intended to protect Greek populations in India,[131] and to protect the Buddhist faith from the religious persecutions of the Shungas.[132] The city of Sirkap founded by Demetrius combines Greek and Indian influences without signs of segregation between the two cultures.

The first Greek coins to be minted in India, those of Menander I and Appolodotus I bear the mention "Saviour king" (ΒΑΣΙΛΕΩΣ ΣΩΤΗΡΟΣ), a title with high value in the Greek world which indicated an important deflective victory. For instance, Ptolemy I had been Soter (saviour) because he had helped save Rhodes from Demetrius the Besieger, and Antiochus I because he had saved Asia Minor from the Gauls. The title was also inscribed in Pali as ("Tratarasa") on the reverse of their coins. Menander and Apollodotus may indeed have been saviours to the Greek populations residing in India, and to some of the Indians as well.[133]

Also, most of the coins of the Greek kings in India were bilingual, written in Greek on the front and in Pali on the back (in the Kharosthi script, derived from Aramaic, rather than the more eastern Brahmi, which was used only once on coins of Agathocles of Bactria), a tremendous concession to another culture never before made in the Hellenic world.[134] From the reign of Apollodotus II, around 80 BC, Kharosthi letters started to be used as mintmarks on coins in combination with Greek monograms and mintmarks, suggesting the participation of local technicians to the minting process.[135] Incidentally, these bilingual coins of the Indo-Greeks were the key in the decipherment of the Kharoshthi script by James Prinsep (1799–1840).[136] Kharoshthi became extinct around the 3rd century AD.

In Indian literature, the Indo-Greeks are described as Yavanas (in Sanskrit),[137][138][139] or Yonas (in Pali)[140] both thought to be transliterations of "Ionians". In the Harivamsa the "Yavana" Indo-Greeks are qualified, together with the Sakas, Kambojas, Pahlavas and Paradas as Kshatriya-pungava i.e. foremost among the Warrior caste, or Kshatriyas. The Majjhima Nikaya explains that in the lands of the Yavanas and Kambojas, in contrast with the numerous Indian castes, there were only two classes of people, Aryas and Dasas (masters and slaves).


 * Religion

In addition to the worship of the Classical pantheon of the Greek deities found on their coins (Zeus, Herakles, Athena, Apollo...), the Indo-Greeks were involved with local faiths, particularly with Buddhism, but also with Hinduism and Zoroastrianism.[142]

After the Greco-Bactrians militarily occupied parts of northern India from around 180 BC, numerous instances of interaction between Greeks and Buddhism are recorded. Menander I, the "Saviour king", seems to have converted to Buddhism,[143] and is described as a great benefactor of the religion, on a par with Ashoka or the future Kushan emperor Kanishka.[144] The wheel he represented on some of his coins was probably Buddhist,[145] and he is famous for his dialogues with the Buddhist monk Nagasena, transmitted to us in the Milinda Panha, which explain that he became a Buddhist arhat:


 * "And afterwards, taking delight in the wisdom of the Elder, he (Menander) handed over his kingdom to his son, and abandoning the household life for the house-less state, grew great in insight, and himself attained to Arahatship!"
 * – The Questions of King Milinda, translation by T. W. Rhys Davids.

Another Indian text, the Stupavadana of Ksemendra, mentions in the form of a prophecy that Menander will build a stupa in Pataliputra.[146]

Plutarch also presents Menander as an example of benevolent rule, and explains that upon his death, the honour of sharing his remains was claimed by the various cities under his rule, and they were enshrined in "monuments" (μνημεία, probably stupas), in a parallel with the historic Buddha:[147]

"But when one Menander, who had reigned graciously over the Bactrians, died afterwards in the camp, the cities indeed by common consent celebrated his funerals; but coming to a contest about his relics, they were difficultly at last brought to this agreement, that his ashes being distributed, everyone should carry away an equal share, and they should all erect monuments to him." —Plutarch, "Political Precepts" Praec. reip. ger. 28, 6).[148] The Butkara stupa was "monumentalized" by the addition of Hellenistic architectural decorations during Indo-Greek rule in 2nd century BC.[141] -->

Eucratides the Great
Back in Bactria, Eucratides I, either a general of Demetrius or an ally of the Seleucids, managed to overthrow the Euthydemid dynasty and establish his own rule, the short-lived Eucratid dynasty, around 170 BC, probably dethroning Antimachus I and Antimachus II. The Indian branch of the Euthydemids tried to strike back. An Indian king called Demetrius (very likely Demetrius II) is said to have returned to Bactria with 60,000 men to oust the usurper, but he apparently was defeated and killed in the encounter: "Eucratides led many wars with great courage, and, while weakened by them, was put under siege by Demetrius, king of the Indians. He made numerous sorties, and managed to vanquish 60,000 enemies with 300 soldiers, and thus liberated after four months, he put India under his rule."

Eucratides campaigned extensively in present-day northwestern India, and ruled a vast territory, as indicated by his minting of coins in many Indian mints, possibly as far as the Jhelum River in Punjab. In the end, however, he was repulsed by the Indo-Greek king Menander I, who managed to create a huge unified territory. In a rather confused account, Justin explains that Eucratides was killed on the field by "his son and joint king", who would be his own son, either Eucratides II or Heliocles I (although there are speculations that it could have been his enemy's son Demetrius II). The son drove over Eucratides' bloodied body with his chariot and left him dismembered without a sepulcher:

"As Eucratides returned from India, he was killed on the way back by his son, whom he had associated to his rule, and who, without hiding his parricide, as if he didn't kill a father but an enemy, ran with his chariot over the blood of his father, and ordered the corpse to be left without a sepulture."

Defeats by Parthia
During or after his Indian campaigns, Eucratides was attacked and defeated by the Parthian king Mithridates I, possibly in alliance with partisans of the Euthydemids:

"The Bactrians, involved in various wars, lost not only their rule but also their freedom, as, exhausted by their wars against the Sogdians, the Arachotes, the Dranges, the Arians and the Indians, they were finally crushed, as if drawn of all their blood, by an enemy weaker than them, the Parthians."

Following his victory, Mithridates I gained Bactria's territory west of the Arius, the regions of Tapuria and Traxiane: "The satrapy Turiva and that of Aspionus were taken away from Eucratides by the Parthians."

In the year 141 BC, the Greco-Bactrians seem to have entered in an alliance with the Seleucid king Demetrius II to fight again against Parthia:

"The people of the Orient welcomed his (Demetrius II's) arrival, partly because of the cruelty of the Arsacid king of the Parthians, partly because, used to the rule of the Macedonians, they disliked the arrogance of this new people. Thus, Demetrius, supported by the Persians, Elymes and Bactrians, routed the Parthians in numerous battles. At the end, deceived by a false peace treaty, he was taken prisoner."

The 5th century historian Orosius reports that Mithridates I managed to occupy territory between the Indus and the Hydaspes towards the end of his reign (c. 138 BC, before his kingdom was weakened by his death in 136 BC).

Heliocles I ended up ruling what territory remained. The defeat, both in the west and the east, may have left Bactria very weakened and open to nomadic invasions.

Nomadic invasions and fall
A nomadic steppe people called the Yuezhi inhabited a region thousands of miles to the east of Bactria on the edges of the Han Empire called the Hexi Corridor. Shortly before 176 BC, the Xiongnu invaded the Hexi Corridor, forcing the Yuezhi to flee the region. In 162 BC the Yuezhi were driven west to the Ili River valley by the Xiongnu. In 132 they were driven out of the Ili valley by the Wusun. The surviving Yuezhi migrated again south towards the territory just north of the Oxus River where they encountered and expelled a nomadic steppe nation called Sakastan. Around 140 BC, eastern Scythians (the Saka, or Sacaraucae of Greek sources), apparently being pushed forward by the southward migration of the Yuezhi started to invade various parts of Parthia and Bactria. Their invasion of Parthia is well documented: they attacked in the direction of the cities of Merv, Hecatompolis and Ecbatana. They managed to defeat and kill the Parthian king Phraates II, son of Mithridates I, routing the Greek mercenary troops under his command (troops he had acquired during his victory over Antiochus VII). Again in 123 BC, Phraates's successor, his uncle Artabanus I, was killed by the Scythians.

When the Han Chinese diplomat Zhang Qian visited the Yuezhi in 126 BC, trying to obtain their alliance to fight the Xiongnu, he explained that the Yuezhi were settled north of the Oxus but also held under their sway the territory south of Oxus, which makes up the remainder of Bactria.

According to Zhang Qian, the Yuezhi represented a considerable force of between 100,000 and 200,000 mounted archer warriors, with customs identical to those of the Xiongnu, which would probably have easily defeated Greco-Bactrian forces (in 208 BC when the Greco-Bactrian king Euthydemus I confronted the invasion of the Seleucid king Antiochus III the Great, he commanded 10,000 horsemen). Zhang Qian actually visited Bactria (named Daxia in Chinese) in 126 BC, and portrays a country which was totally demoralized and whose political system had vanished, although its urban infrastructure remained:

"Daxia (Bactria) is located over 2,000 li southwest of Dayuan, south of the Gui (Oxus) river. Its people cultivate the land and have cities and houses. Their customs are like those of Dayuan. It has no great ruler but only a number of petty chiefs ruling the various cities. The people are poor in the use of arms and afraid of battle, but they are clever at commerce. After the Great Yuezhi moved west and attacked Daxia, the entire country came under their sway. The population of the country is large, numbering some 1,000,000 or more persons. The capital is called the city of Lanshi (Bactra) and has a market where all sorts of goods are bought and sold. (Records of the Great Historian by Sima Qian, quoting Zhang Qian, trans. Burton Watson)"

The Yuezhi further expanded southward into Bactria around 120 BC, apparently further pushed out by invasions from the northern Wusun. It seems they also pushed Scythian tribes before them, which continued to India, where they came to be identified as Indo-Scythians. This invasion of Bactria is also described in western Classical sources from the 1st century BC:

"The best known tribes are those who deprived the Greeks of Bactriana, the Asii, Pasiani, Tochari, and Sacarauli, who came from the country on the other side of the Jaxartes, opposite the Sacae and Sogdiani."

Around that time the king Heliocles abandoned Bactria and moved his capital to the Kabul valley, from where he ruled his Indian holdings. Apparently there were two other Greco-Bactrian kings preceding Heliocles in the same region and from the same dynasty, named Eucratides II and Plato Epiphanes, the latter probably being a brother of Eucratides I. Since Heliocles left the Bactrian territory, he is technically the last Greco-Bactrian king, although several of his descendants, moving beyond the Hindu Kush, would form the western part of the Indo-Greek kingdom. The last of these "western" Indo-Greek kings, Hermaeus, would rule until around 70 BC, when the Yuezhi again invaded his territory in the Paropamisadae (while the "eastern" Indo-Greek kings would continue to rule until around AD 10 in the area of the Punjab region). Overall, the Yuezhi remained in Bactria for more than a century. They became Hellenized to some degree, as suggested by their adoption of the Greek alphabet to write their later Iranian court language, and by numerous remaining coins, minted in the style of the Greco-Bactrian kings, with the text in Greek.

There is evidence for the persistence of Greek populations in Bactria after the collapse of the Greco-Bactrian kingdom. For example, an obol of a previously unknown ruler called Antigonus has been found and it seems he ruled after the kingdom's collapse, as evidenced by the use of a lunate sigma and the lower art quality of the coin, perhaps dating from the end of the 1st century BC. Antigonus might have briefly won a battle against the Yuezhi or the Saka before he was overrun himself.

Around 12 BC the Yuezhi then moved further to northern India where they established the Kushan Empire.

Military forces
Before the Greek conquest, the armies of Bactria were overwhelmingly composed of cavalry and were well known as effective soldiers, making up large portions of the Achaemenid cavalry contingents. 2,000 Bactrian horsemen fought at the Granicus against Alexander and 9,000 at the Battle of Gaugamela on the left flank of Darius' army. Herodotus also mentions the widespread use of chariots among the Bactrians. After Alexander's conquest of Bactria, Bactrian cavalry units served in his army during the invasion of India and after the Indian campaign, Alexander enlarged his elite companion cavalry by adding Bactrians, Sogdians and other east Iranian cavalrymen. Both Aeschylus (The Persians, v. 318) and Curtius mention that Bactria was able to field a force of 30,000 horse. Most of these horsemen were lightly armed, using bows and javelins before closing with sword and spear. Herodotus describes the Persian cavalry of Mardonius at the Battle of Plataea (which included Bactrians) as horse archers (hippotoxotai). Bactrian infantry is described by Herodotus as wearing caps in the Median style, short spears and reed Scythian style bows.

Alexander and Seleucus I both settled Macedonians and other Greeks in Bactria, and archeological finds in the region have also attested to a major Macedonian presence, as evidenced by the presence of symbols, style of coinage, and epigraphic names. Greek garrisons in the satrapy of Bactria were housed in fortresses called phrouria and at major cities. Military colonists were settled in the countryside and were each given an allotment of land called a kleros. These colonists numbered in the tens of thousands, and were trained in the fashion of the Macedonian army. A Greek army in Bactria during the anti-Macedonian revolt of 323 BC numbered 23,000.

The army of the Greco-Bactrian kingdom was then a multi-ethnic force with Greek colonists making up large portions of the infantry as pike phalanxes, supported by light infantry units of local Bactrians and mercenary javelin-wielding Thureophoroi. The cavalry arm was very large for a Hellenistic army and composed mostly of native Bactrian, Sogdian and other Indo-Iranian light horsemen. Polybius mentions 10,000 horse at the Battle of the Arius river in 208 BC. Greco-Bactrian armies also included units of heavily armored cataphracts and small elite units of companion cavalry. The third arm of the Greco-Bactrian army was the Indian war elephants, which are depicted in some coins with a tower (thorakion) or howdah housing men armed with bows and javelins. This force grew as the Greco-Bactrian kingdom expanded into India and was widely depicted in Greco-Bactrian coinage. Other units in the Bactrian military included mercenaries or levies from various surrounding peoples such as the Scythians, Dahae, Indians, and Parthians.

Greek culture in Bactria
Greeks first began settling the region long before Alexander conquered it. The Persian Empire had a policy of exiling rebelling Greek communities to that region long before it fell to Greek conquest. Therefore, it had a considerable Greek community that was expanded upon after Macedonian conquest.

The Greco-Bactrians were known for their high level of Hellenistic sophistication, and kept regular contact with both the Mediterranean and neighbouring India. They were on friendly terms with India and exchanged ambassadors.

Their cities, such as Ai-Khanoum in northeastern Afghanistan (probably Alexandria on the Oxus), and Bactra (modern Balkh) where Hellenistic remains have been found, demonstrate a sophisticated Hellenistic urban culture. This site gives a snapshot of Greco-Bactrian culture around 145 BC, as the city was burnt to the ground around that date during nomadic invasions and never re-settled. Ai-Khanoum "has all the hallmarks of a Hellenistic city, with a Greek theater, gymnasium and some Greek houses with colonnaded courtyards" (Boardman). Remains of Classical Corinthian columns were found in excavations of the site, as well as various sculptural fragments. In particular a huge foot fragment in excellent Hellenistic style was recovered, which is estimated to have belonged to a 5–6 meter tall statue.

One of the inscriptions in Greek found at Ai-Khanoum, the Herôon of Kineas, has been dated to 300–250 BC, and describes Delphic maxims:

παῖς ὢν κόσμιος γίνου ἡβῶν ἐγκρατής μέσος δίκαιος πρεσβύτης εὔβουλος τελευτῶν ἄλυπος

As children, learn good manners. As young men, learn to control the passions. In middle age, be just. In old age, give good advice. Then die, without regret.

Several other Greco-Bactrian cities have been identified, such as Alexandria Eschate in modern Tajikistan and another city named Amphipolis. The latter being a previously unknown city which was mentioned on a Bactrian document and was clearly named after the Amphipolis in ancient Macedonia. Excavated cities include Kampir Tepe in Uzbekistan, as well as Saksanokhur and Takht-i Sangin in Tajikistan (archaeological searches by a Soviet team under B.A. Litvinski), or in Dal'verzin Tepe.

Takht-i Sangin
Takht-i Sangin (Tajik: "Throne of Stone") is an archaeological site located near the confluence of the Vakhsh and Panj rivers, the source of the Amu Darya, in southern Tajikistan. During the Hellenistic period it was a city of the Greco-Bactrian kingdom with a large temple dedicated to the Oxus (Vakhsh river), which remained in use in the following Kushan period, until the third century AD. The site may have been the source of the Oxus Treasure.

Coinage
Some of the Greco-Bactrian coins, and those of their successors the Indo-Greeks, are considered the finest examples of Greek numismatic art with "a nice blend of realism and idealization", including the largest coins to be minted in the Hellenistic world: the largest gold coin was minted by Eucratides (reigned 171–145 BC), the largest silver coin by the Indo-Greek king Amyntas Nicator (reigned c. 95–90 BC). The portraits "show a degree of individuality never matched by the often bland depictions of their royal contemporaries further West" (Roger Ling, "Greece and the Hellenistic World"). Such portraits show high levels of detail with some kings seen smiling, while others are shown aging throughout their reign, even depicting old age on their coins. Such realistic imagery on coins seems to have been very important to the Greco-Bactrian kings, who wanted to display their individuality or to distinguish themselves from the style of other contemporary Hellenistic kingdoms.

Greco-Bactrian coins also depict the kings wearing distinct headgear, such as helmets modelled on the Boeotian cavalry helmet of Alexander the Great, or the Macedonian kausia. This is unique to the Greco-Bactrian kings, who first featured such designs on their coins as other Hellenistic rulers are shown to only wear the diadem. As such the Greco-Bactrians are especially known for their innovative coinage designs. Further examples include the use of different metal alloys for their coins and the issue of bilingual coinage, using Greek on the obverse and an Indian language (such as Pali) in the Kharoshti or Brahmi scripts on the reverse. Local Indian symbols and deities are also depicted, i.e. Buddhist symbols and some Hindu deities (see Influence on Indian art subsection below). This syncretic design was first introduced after king Demetrius I of Bactria conquered areas of the Indian subcontinent between 190 and 180 BC, with king Pantaleon being the first to issue coins of the Indian standard, when the Greeks truly started ruling over Indian populations.

Contacts with Han China
To the north, Euthydemus also ruled Sogdiana and Ferghana, and there are indications that from Alexandria Eschate the Greco-Bactrians may have led expeditions as far as Kashgar and Ürümqi in Xinjiang, leading to the first known contacts between China and the West around 220 BC. The Greek historian Strabo too writes that: "they extended their empire even as far as the Seres (Chinese) and the Phryni". (Strabo, XI.XI.I). Several statuettes and representations of Greek soldiers have been found north of the Tian Shan, on the doorstep to China, and are today on display in the Xinjiang museum at Ürümqi (Boardman). Middle Eastern or Greek influences on Chinese art have also been suggested (Hirth, Rostovtzeff). Designs with rosette flowers, geometric lines, meanders and glass inlays, suggestive of Egyptian, Persian, and/or Hellenistic influences, can be found on some early Han dynasty bronze mirrors.

Some speculate that Greek influence is found in the artworks of the burial site of China's first Emperor Qin Shi Huang, dating back to the 3rd century BC, including in the manufacture of the famous Terracotta army. This idea suggested that Greek artists may have come to China at that time to train local artisans in making sculptures However, this idea is disputed.

Numismatics also suggest that some technology exchanges may have occurred on these occasions: the Greco-Bactrians were the first in the world to issue cupro-nickel (75:25 ratio) coins, an alloy technology only known by the Chinese at the time under the name "White copper" (some weapons from the Warring States period were in copper-nickel alloy). The practice of exporting Chinese metals, in particular iron, for trade is attested around that period. Kings Euthydemus, Euthydemus II, Agathocles and Pantaleon made these coin issues around 170 BC. An alternative suggestion is that the metal in the coinage derived from a mine where a cupro-nickel alloy occurred naturally, perhaps Anarak in eastern Iran. Copper-nickel would not be used again in coinage until the 19th century.

The presence of Chinese people in India from ancient times is also suggested by the accounts of the "Ciñas" in the Mahabharata and the Manu Smriti. The Han dynasty explorer and ambassador Zhang Qian visited Bactria in 126 BC, and reported the presence of Chinese products in the Bactrian markets:

"'When I was in Bactria (Daxia)', Zhang Qian reported, 'I saw bamboo canes from Qiong and cloth made in the province of Shu (territories of southwestern China). When I asked the people how they had gotten such articles, they replied, 'Our merchants go buy them in the markets of Shendu (India).' (Shiji 123, Sima Qian, trans. Burton Watson)." The purpose of Zhang Qian's journey was to look for civilizations on the steppe that the Han could ally with against the Xiongnu. Upon his return, Zhang Qian informed the Chinese emperor Han Wudi of the level of sophistication of the urban civilizations of Ferghana, Bactria and Parthia, who became interested in developing commercial relationships with them:

"The Son of Heaven on hearing all this reasoned thus: Ferghana (Dayuan) and the possessions of Bactria (Daxia) and Parthia (Anxi) are large countries, full of rare things, with a population living in fixed abodes and given to occupations somewhat identical with those of the Chinese people, and placing great value on the rich produce of China. (Hanshu, Former Han History)."

A number of Chinese envoys were then sent to Central Asia, triggering the development of the Silk Road from the end of the 2nd century BC.

Contacts with the Indian subcontinent (250–180 BC)
The Indian emperor Chandragupta, founder of the Mauryan dynasty, conquered the northwestern subcontinent upon the death of Alexander the Great around 323 BC. However, contacts were kept with his Greek neighbours in the Seleucid Empire, a dynastic alliance or the recognition of intermarriage between Greeks and Indians were established (described as an agreement on Epigamia in Ancient sources), and several Greeks, such as the historian Megasthenes, resided at the Mauryan court. Subsequently, each Mauryan emperor had a Greek ambassador at his court.



Chandragupta's grandson Ashoka converted to the Buddhist faith and became a great proselytizer in the line of the traditional Pali canon of Theravada Buddhism, directing his efforts towards the Indo-Iranic and the Hellenistic worlds from around 250 BC. According to the Edicts of Ashoka, set in stone, some of them written in Greek, he sent Buddhist emissaries to the Greek lands in Asia and as far as the Mediterranean. The edicts name each of the rulers of the Hellenistic world at the time.

"The conquest by Dharma has been won here, on the borders, and even six hundred yojanas (4,000 miles) away, where the Greek king Antiochos rules, beyond there where the four kings named Ptolemy, Antigonos, Magas and Alexander rule, likewise in the south among the Cholas, the Pandyas, and as far as Tamraparni. (Edicts of Ashoka, 13th Rock Edict, S. Dhammika)."

Some of the Greek populations that had remained in northwestern India apparently converted to Buddhism:

"Here in the king's domain among the Greeks, the Kambojas, the Nabhakas, the Nabhapamkits, the Bhojas, the Pitinikas, the Andhras and the Palidas, everywhere people are following Beloved-of-the-Gods' instructions in Dharma. (Edicts of Ashoka, 13th Rock Edict, S. Dhammika)."

Furthermore, according to Pali sources, some of Ashoka's emissaries were Greek Buddhist monks, indicating close religious exchanges between the two cultures:

"When the thera (elder) Moggaliputta, the illuminator of the religion of the Conqueror (Ashoka), had brought the (third) council to an end ... he sent forth theras, one here and one there: ... and to Aparantaka (the 'Western countries' corresponding to Gujarat and Sindh) he sent the Greek (Yona) named Dhammarakkhita ... and the thera Maharakkhita he sent into the country of the Yona. (Mahavamsa, XII)."

Greco-Bactrians probably received these Buddhist emissaries (at least Maharakkhita, lit. "The Great Saved One", who was "sent to the country of the Yona") and somehow tolerated the Buddhist faith, although little proof remains. In the 2nd century AD, the Christian dogmatist Clement of Alexandria recognized the existence of Buddhist Sramanas among the Bactrians ("Bactrians" meaning "Oriental Greeks" in that period), and even their influence on Greek thought:

"Thus philosophy, a thing of the highest utility, flourished in antiquity among the barbarians, shedding its light over the nations. And afterwards it came to Greece. First in its ranks were the prophets of the Egyptians; and the Chaldeans among the Assyrians; and the Druids among the Gauls; and the Sramanas among the Bactrians ('Σαρμαναίοι Βάκτρων'); and the philosophers of the Celts; and the Magi of the Persians, who foretold the Saviour's birth, and came into the land of Judea guided by a star. The Indian gymnosophists are also in the number, and the other barbarian philosophers. And of these there are two classes, some of them called Sramanas ('Σαρμάναι'), and others Brahmins ('Βραφμαναι')."

Influence on Indian art during the 3rd century BC
The Greco-Bactrian city of Ai-Khanoum, being located at the doorstep of India, interacting with the Indian subcontinent, and having a rich Hellenistic culture, was in a unique position to influence Indian culture as well. It is considered that Ai-Khanoum may have been one of the primary actors in transmitting Western artistic influence to India, for example in the creation of the Pillars of Ashoka or the manufacture of the quasi-Ionic Pataliputra capital, all of which were posterior to the establishment of Ai-Khanoum.

The scope of adoption goes from designs such as the bead and reel pattern, the central flame palmette design and a variety of other moldings, to the lifelike rendering of animal sculpture and the design and function of the Ionic anta capital in the palace of Pataliputra.

First visual representations of Indian deities
One of the last Greco-Bactrian kings, Agathocles of Bactria (ruled 190–180 BC), issued remarkable Indian-standard square coins bearing the first known representations of Indian deities, which have been variously interpreted as Vishnu, Shiva, Vasudeva, Buddha or Balarama. Altogether, six such Indian-standard silver drachmas in the name of Agathocles were discovered at Ai-Khanoum in 1970. These coins seem to be the first known representations of Vedic deities on coins, and they display early Avatars of Vishnu: Balarama-Sankarshana with attributes consisting of the Gada mace and the plow, and Vasudeva-Krishna with the Vishnu attributes of the Shankha (a pear-shaped case or conch) and the Sudarshana Chakra wheel. Some other coins by Agathocles are also thought to represent the Buddhist lion and the Indian goddess Lakshmi, consort of Vishnu. The Indian coinage of Agathocles is few but spectacular. These coins at least demonstrate the readiness of Greek kings to represent deities of foreign origin. The dedication of a Greek envoy to the cult of Garuda at the Heliodorus pillar in Besnagar could also be indicative of some level of religious syncretism.

List of Greco-Bactrian Kings
The below table lists the known Greek rulers of Bactria, along with their dates and titles or epithets.

It must be noted that dates that overlap show that multiple kings ruled at the same time, but in different regions whose exact details are not known very well. For example Apollodotus I likely ruled areas south of Bactria and the Indian subcontinent while Antimachus I ruled in Bactria. Eucratides II and Plato would have each ruled smaller parts of southern Bactria.