Hernán Siles Zuazo (21 March 1914 – 6 August 1996) was a Bolivian politician who served as the 46th president of Bolivia twice nonconsecutively from 1956 to 1960 and from 1982 to 1985. He also briefly served as interim president in April 1952, and as the 27th vice president of Bolivia from 1952 to 1956. Early life Hernán Siles was the illegitimate son of the last Republican Party president of Bolivia, Hernando Siles Reyes and Isabel Zuazo Cusicanqui. Siles was raised by his mother. His half-brother Luis Adolfo Siles Salinas was president for five months in 1969. In 1931 Siles graduated from the American Institute in La Paz. He served in Bolivian army and was decorated for injury sustained while fighting in the Chaco War of 1932–35. After the war he finished San Andres University with a degree in law. Siles was married to Maria Teresa Ormachea del Carpio and had three daughters, Marcela, Ana Maria and Isabel. Formation of the MNR and the 1952 Revolution In 1940 Siles was elected in the Chamber of Deputies. Gravitating toward the reformist side of the political spectrum (even though his father had been one of the pillars of the Old Regime), in 1941 he founded along with Víctor Paz Estenssoro and others, the influential Revolutionary Nationalist Movement (Movimiento Nacionalista Revolucionario, or MNR). The MNR was behind the coup that installed the progressive military administration of Gualberto Villarroel (1943–46), but was forced from power due to U.S. pressure and also by Villarroel's overthrow in 1946 after which Siles was exiled to Argentina. There he worked as a correspondent for Associated Press from November 1947 until September 1948. In the 1951 elections Paz Estenssoro run for presidency with Siles as his vice-presidential running mate, and won the contest with 42.9% of the vote. However, the ultra-conservative government of Mamerto Urriolagoitía refused to recognize the results and instead turned over the presidency to the commander of the Bolivian army, general Hugo Ballivián. At that point the MNR party went underground and on 9–11 April 1952 led the historic Bolivian National Revolution, aided by defections from the armed forces to the rebel cause (key among which was general Antonio Seleme). Siles played a major role in the revolutionary uprising, along with Juan Lechín, since the MNR leader Paz Estenssoro was at the time in exile in Argentina. Vice President (1952–1956) Having defeated the military and toppled