Third Upper Peru campaign Third Upper Peru campaign Third Alto Perú campaign (1815): The Northern Army, unofficially commanded by José Rondeau, started another campaign, but this time without the authorization of Supreme Director Álvarez Thomas. With the lack of official support, the army faced anarchy and later would lose the aid of the Provincial Army of Salta, commanded by Martín Miguel de Güemes. After being defeated in the battles of Venta y Media (October 21) and Sipe-Sipe (November 28), the northern territories were lost. They were reannexed by the Spanish Viceroyalty of Peru, and later became present-day Bolivia. This unsuccessful outcome to the campaign
History of Peru since most of the presidents that ruled the country were from the social elite. During Augusto B. Leguía's periods in government [1908–1912 and 1919–1930, the latter known as the "Oncenio" (the "Eleventh")], the entrance of American capital became general and the bourgeoisie was favored. This policy, along with increased dependence on foreign investment, focused opposition from the most progressive sectors of Peruvian society against the landowner oligarchy. There was a final peace treaty in 1929, signed between Peru and Chile and called the Treaty of Lima by which Tacna returned to Peru and Peru yielded permanently the formerly rich provinces