Chilean occupation of Peru

Peruvian Republic
República Peruana (Spanish)
1879–1883
Peru in 1881
CapitalLima
(1881–1883)
Cajamarca
(1881–1884)
GovernmentMilitary occupation by Chile
President (of Chile) 
 1879–1881
Aníbal Pinto
 1881–1883
Domingo Santa María
President (of Peru) 
 1881
Francisco García Calderón
 1881–1883
Lizardo Montero
 1883–1885
Miguel Iglesias
Commander in Chief of the Occupation Forces 
 1881
Cornelio Saavedra
 1881
Pedro Lagos
 1881–1883
Patricio Lynch
History 
2 November 1879
23 October 1883
 Chilean withdrawal
29 October 1883
Preceded by
Succeeded by
Peru
Peru
Today part ofChile
Peru

The Chilean occupation of Peru (Spanish: Ocupación chilena del Perú) began on November 2, 1879, with the beginning of the Tarapacá campaign during the War of the Pacific. The Chilean Army successfully defeated the Peruvian Army and occupied the southern Peruvian territories of Tarapacá, Arica and Tacna. By January 1881, the Chilean army had reached Lima, and on January 17 of the same year, the occupation of Lima began.

During the occupation, a collaborationist government was established in La Magdalena, known as the Government of La Magdalena (Spanish: Gobierno de La Magdalena), headed by Francisco García Calderón, that served as the representative government of Peru in order to negotiate the end of the war. After García Calderón's refusal to agree to the territorial transfer of Tarapacá, Arica, and Tacna, he was exiled to Chile along with his wife, where he was pressured again until Lizardo Montero's Cry of Montán, and the establishment of his new government in Cajamarca, known as the Regenerator Government (Spanish: Gobierno Regenerador), which would be recognized as the successor of García Calderón's government by Chile.

The occupation came to an end after the signing of the Treaty of Ancón on October 23, 1883, with Chilean troops retreating on October 29. However, Chilean forces continued to occupy and administer Tarata until 1925, while a final agreement between the two countries regarding Tacna and Arica was reached in 1929.