Order of battle at Tacna

The Battle at Tacna was an engagement during the War of the Pacific (1879–1883) between Chile and the Allied Forces of Peru and Bolivia. It was fought on May 20, 1880, with the forces aligned as follows:

Chilean North Operations Army
Commanding General: Manuel Baquedano González

Chief of Staff: Col. Velasquez

Infantry
I Division

Col. Santiago Amengual

Strength: 2,547 men II Division
 * Esmeralda Infantry Regiment (Col. Santiago Amengual) (8 companies)
 * Navales Infantry Battalion (Col. Martiniano Urriola) (4 companies)
 * Chillán Infantry Battalion (Juan Vargas Pinochet) (4 companies)
 * Valparaíso Infantry Battalion (Jacinto Niño) (3 companies)

Lt. Col. Francisco Barcelo

Strength: 2,130 men III Division
 * 2nd Line Infantry Regiment (Col. Estanislao del Canto)
 * Santiago Infantry Regiment (Lt. Col. Francisco Barcelo)
 * Atacama Infantry Regiment (Lt. Col. Juan Martinez)

Col. Jose Domingo Amunategui

Strength: 1,858 men IV Division
 * Artillería de Marina Infantry Regiment
 * Coquimbo Infantry Battalion
 * Chacabuco Infantry Battalion

Col. Orozimbo Barbosa

Strength: 2,285 men Reserve
 * Lautaro Infantry Battalion
 * Cazadores del Desierto Infantry Battalion
 * Zapadores Infantry Battalion (Lt. Col. Ricardo Santa Cruz)

Col. Mauricio Muñoz

Strength: 2,335 men
 * "Buin" 1st Line Infantry Regiment (Col. Juan Leon Garcia)
 * 3rd Line Infantry Regiment (Col. Ricardo Castro)
 * 4th Line Infantry Regiment (Col. Luis Solo de Zaldívar)

Cavalry

 * Granaderos Regiment (Horse Grenadiers)
 * Cazadores Regiment (Light Cavalry)
 * Carabineros de Yungay Regiment (Light Cavalry-Carabiners)

Artillery

 * 37 cannons and 4 machine guns from the 1st Artillery Regiment

Allies
Commanding General: Narciso Campero, Bolivian Army

Strength: 13,650 men

I Southern Peruvian Army
I Division

Col. Justo Pastor Dávila II Division
 * Lima Nº 11 Battalion
 * Cazadores de Cuzco Battalion

Col. Andrés Avelino Cáceres III Division
 * Zepita Battalion
 * Cazadores de Misti Battalion

Col. Belisario Suárez IV Division
 * Arica Battalion
 * Pisagua Battalion

Col. Jacinto Mendoza V Division
 * Victoria Battalion
 * Huascar Battalion

Col. Alejandro Herrera VI Division
 * Ayacucho Battalion
 * Arequipa Battalion

César Canevaro Nacionales Division
 * Lima Nº 21 Battalion
 * Cazadores del Rimac Battalion (Col. Víctor Fajardo)

Col. del Solar Cavalry Artillery
 * Formed by civilians and policemen of Tacna (the latter from the Peruvian Civil Guard)
 * Husares de Junin Squadron
 * Gendarmes de Tacna Squadron
 * Guias Squadron
 * Flanqueadores de Tacna Squadron
 * 10 cannons and 3 machine guns

Bolivian Army
I Division

Col. Severino Zapata II Division
 * Viedma Battalion
 * Padilla Battalion
 * Sucre Battalion

Col. Claudio Acosta III Division
 * Tarija Battalion
 * Chorolque Battalion
 * Grau Battalion
 * Loa Battalion

Col. Idelfonso Murgia IV Division
 * Murillo Battalion
 * Alianza Battalion

Col. Alfonso Gonzalez Cavalry Artillery
 * Aroma Battalion
 * Husares Squadron
 * Coraceros Squadron
 * 6 cannons and 4 machine guns