José de San Martín and Simón Bolívar. During the early years of the Republic, endemic struggles for power between military leaders caused political instability.
Peruvian national identity was forged during this period, as Bolivarian projects for a Latin American Confederation floundered and a union with Bolivia proved ephemeral. Between the 1840s and 1860s, Peru enjoyed a period of stability under the presidency of Ramón Castilla through increased state revenues from guano exports. However, by the 1870s, these resources had been depleted, the country was heavily indebted, and political in-fighting was again on the rise.
Peru was defeated by Chile in the 1879–1883 War of the Pacific, ceding the provinces of Arica and Tarapacá in the treaties of Ancón and Lima. Internal struggles after the war were followed by a period of stability under the Civilista Party, which lasted until the onset of the authoritarian regime of Augusto B. Leguía. The Great Depression caused the downfall of Leguía, renewed political turmoil, and the emergence of the American Popular Revolutionary Alliance (APRA). The rivalry between this organization and a coalition of the elite and the military defined Peruvian politics for the following three decades.
In 1968, the Armed Forces, led by General Juan Velasco Alvarado, staged a coup against president Fernando Belaunde. The new regime undertook radical reforms aimed at fostering development but failed to gain widespread support. In 1975, General Francisco Morales Bermúdez forcefully replaced Velasco, paralyzed reforms, and oversaw the reestablishment of democracy. During the 1980s, Peru faced a considerable external debt, ever-growing inflation, a surge in drug trafficking, and massive political violence. Under the presidency of Alberto Fujimori (1990–2000), the country started to recover; however, accusations of authoritarianism, corruption, and human rights violations forced his resignation after the
