War of the Pacific
Map of the War of the Pacific.en2.svg
Map showing changes of territory caused by the War of the Pacific. Earlier maps (1879) show different lines of the border between Bolivia-Peru and Bolivia-Argentina.
DateApril 5, 1879 – October 20, 1883 (Chile-Peru Peace) Bolivia-Chile armistice in 1884; peace with Bolivia signed October 20, 1904
Location
Peru and Bolivia in Pacific coast of South America
Result

Chilean victory

  • Bolivia becomes a landlocked country.
Territorial
changes
  • Litoral Department (Antofagasta) ceded by Bolivia to Chile in 1904.
  • Tarapacá Department ceded by Peru to Chile in 1884.
  • Puna de Atacama ceded by Bolivia to Chile and Argentina in 1889 and 1899
  • Tacna Region occupied by Chile in 1885, returned to Peru in 1925.
  • Arica Province and Tacna Province occupied by Chile in
Belligerents
Bolivia
 Peru
Chile
Commanders and leaders
Presidents of Bolivia
H. Daza (1876–1879)
P.J.D. de Guerra (1879)
N. Campero (1879–1884)

Presidents of Peru
M.I. Prado (1876–1879)
L. La Puerta (1879)
N. de Piérola (1879–1881)
F. García C. (1881)
L. Montero F. (1881–1883)
M. Iglesias (1882–1885)
Presidents of Chile
A. Pinto (1876–1881)
D. Santa María (1881–1886)
Strength

 Bolivia

1879(prewar)
Bolivian Army:
1,687

 Peru

Peruvian Army:
5,557
Peruvian Navy:
4 ironclads
7 wooden ships
2 torpedo boats

1880

Peruvian Army:
25,000–35,000 men
(Army of Lima)
Peruvian Navy:
3 ironclads
7 wooden ships
2 torpedo boats

 Chile

1879(prewar)
Chilean Army:
2,440 men
Chilean Navy:
2 ironclads
9 wooden ships
4 torpedo boats

1880
Chilean Army:
27,000 (AnteLima)
8,000(Occupation Force)
6,000(Mainland)
Chilean Navy:
3 ironclads
8 wooden ships
10 torpedo boats
Casualties and losses
Killed and wounded:
About 25,000
Captured:
About 9,000
Killed:
2,791–2,825
Wounded:
7,193–7,347