Salvador Allende was the dictatorial first official Prime Minister of the Argentinian Empire from 1938 to his death in 1973. Allende succeeded Eduardo Frei Montalva, the acting Prime Minister, in the first popular elections in the nation's history in 1937. Originally elected to a six year term, Allende quickly seized power from the People's Congress and used the Fifth World War to his advantage by adding a wartime amendment to the constitution, allowing him to remain in power for the duration of the war. Allende, unlike other South American leaders, kept his position after the war due to signing an unconditional surrender. Allende proceeded to illegally obtain a second term in the 1950 general elections. After the election, his term became lifelong and he became a dictator in full. Allende died in 1973 and was succeeded by Augusto Pinochet. Allende is remembered for increasing the national standard of living and fixing infrastructure across Argentina. Allende's 35 year rule is generally regarded as successful.