Incas in Central Chile and Uspallata Pass (32º50' S). This attack from the east would have been done in order to avoid the more direct but inhospitable routes crossing the Atacama Desert. José Toribio Medina claimed in 1882 that the Incas entered Central Chile from both north and east. Troops of the Inca Empire are reported to have reached Maule River and had a battle with Mapuches from Maule River and Itata River there. After securing the regions of northern Chile, Copiapó, Coquimbo, Aconcagua and the Maipo Valley around what is now Santiago, the Inca general Sinchiruca sent 20,000 men down to the valley
War of the Pacific in the Andes. For the first five months the war played out in a naval campaign, as Chile struggled to establish a sea-based resupply corridor for its forces in the world’s driest desert. In February 1878, Bolivia imposed a new tax on a Chilean mining company (“Compañía de Salitres y Ferrocarril de Antofagasta”, CSFA) despite Bolivian express warranty in the 1874 Boundary Treaty that it would not increase taxes on Chilean persons or industries for 25 years. Chile protested and solicited to submit it to mediation, but Bolivia refused and considered it a subject of Bolivia’s courts. Chile insisted and