Bruneian Sultanate (1368–1888)

The Sultanate of Brunei (Jawi: كسلطانن بروني) or simply Brunei, also known as the Brunei Empire, was a Malay sultanate, centered around Brunei on the northern coast of Borneo in Southeast Asia. Brunei became a sovereign state around the 15th century, when it substantially expanded after the fall of Malacca to the Portuguese, extending throughout coastal areas of Borneo and the Philippines, before it declined in the 17th and 18th centuries. It became a British protectorate in the 19th century.

Historiography
The limited evidence from contemporary sources poses a challenge in understanding the history of the early Bruneian Sultanate. No local or indigenous sources exist to provide evidence for this. As a result, Chinese texts have been relied on to construct the history of early Brunei. Boni in Chinese sources most likely refers to Western Borneo, while Poli (婆利), probably located in Aceh region in Sumatra, is claimed by local authorities to refer to Brunei as well.

Pre-sultanate history
In the 14th century, Brunei seems to have been a subject of Java. The Javanese manuscript Nagarakretagama, written by Prapanca in 1365, mentioned Barune as the vassal state of Majapahit, which had to make an annual tribute of 40 katis of camphor.

After Majapahit invaded Brunei, its subject kingdoms in the Philippines which were formally under its control, rebelled against Brunei, chief of which was the former kingdom of Sulu which besieged and pillaged it.

"Its (Brunei's) own empire gone, it would appear to have shrunk to its heartland by Brunei bay. It now paid an annual tribute of 40 kati of camphor to the Majapahit Emperor. But worse was to follow. 1369 marks the absolute nadir of Brunei's fortunes, for in that year its former subjects the Suluks put it to sack. So utterly helpless were the Bruneis, that they had to be rescued by the Majapahit fleet, which drove out the intruders, who departed laden with enormous booty and taking the two precious pearls."

Expansion
After the fall of Malacca to the Portuguese, Portuguese merchants traded regularly with Brunei from 1530 and described the capital of Brunei as surrounded by a stone wall. During the rule of Bolkiah, the fifth sultan, the sultanate controlled the coastal areas of northwest Borneo (present-day Brunei, Sarawak and Sabah) and reached Seludong (present-day Manila) and the Sulu Archipelago, including parts of the island of Mindanao.

In the 16th century, the Brunei's influence extended as far as the Kapuas River delta in West Kalimantan. The Malay Sultanate of Sambas in West Kalimantan and the Sultanate of Sulu in the southern Philippines in particular developed dynastic relations with the royal house of Brunei. Even the Muslim Rajahs of Manila, Rajah Matanda, for example had family-links with the Brunei Sultanate. The Malay sultans of Pontianak, Samarinda and Banjarmasin, treated the Sultan of Brunei as their leader. The true nature of Brunei's relationship with other Malay sultanates of coastal Borneo and the Sulu Archipelago is still a subject of study, as to whether it was a vassal state, an alliance, or just a ceremonial relationship. Other regional polities also exercised their influence upon these sultanates. The Sultanate of Banjar (present-day Banjarmasin), for example, was also under the influence of Demak in Java. The growth of Malacca as the largest Southeast Asian entrepôt in the Maritime Silk Road led to a gradual spread of its cultural influence eastward throughout Maritime Southeast Asia. Malay became the regional lingua franca of trade and many polities enculturated Islamic Malay customs and governance to varying degrees, including Kapampangans, Tagalogs and other coastal Philippine peoples. According to Bruneian folklore, around 1500 Sultan Bolkiah launched a successful northward expedition to break Tondo’s monopoly as a regional entrepôt of Chinese trade and established Maynila (Selurong) across the Pasig delta, ruled by his heirs as a satellite.

Bruneian influence spread elsewhere around Manila Bay, present-day Batangas, and coastal Mindoro through closer trade and political relations, with a growing overseas Kapampangan-Tagalog population based in Brunei and beyond in Malacca in various professions as traders, sailors, shipbuilders, mercenaries, governors, and slaves.

Decline
The rising power of the nearby Sultanate of Sulu occurred due to infighting between Bruneian nobles and the king. Brunei eventually lost its authority over the Bajaus and lapsed into a collection of riverine territories ruled by semi-autonomous chiefs.

By the end of 17th century, Brunei entered a period of decline brought on by internal strife over royal succession, colonial expansion of European powers, and piracy. Brunei lost much of its territory due to the arrival of the western powers such as the Spanish in the Philippines, the Dutch in southern Borneo and the British in Labuan, Sarawak and North Borneo. By 1725, Brunei had many of its supply routes to the Sultanate of Sulu.

In 1888, Sultan Hashim Jalilul Alam Aqamaddin appealed to the British to stop further encroachment. In the same year, the British signed a "Treaty of Protection" and made Brunei a British protectorate, which lasted until 1984, when Brunei gained independence.

Government
The sultanate was divided into three traditional land systems known as kerajaan (crown property), kuripan (official property) and tulin (hereditary private property).