A Long Series of Coups

A military coup overthrows President Hipolito Yrigoyen of the centrist party known as the Radical Civic Union. Yrigoyen was the first president to have been cleanly elected by a secret and obligatory vote; he represented the accession to the government of the new middle classes of immigrant origins.
In the following half century, Argentina will undergo no fewer than one military coup per decade and will be governed by more presidents who owe their office to the sword than to the ballot. During this period, which lasted until the democratic election of President Raul Alfonsin, also a Radical Civic Union member, in 1983, only two elected presidents successfully concluded the constitutional term of six years, and both were retired army generals. One of them, Agustin P. Justo, came to power through fraudulent elections in 1932. The other, Juan D. Peron, was overthrown in the middle of his second term as president in 1955.

Horacio Verbitsky's Confessions of an Argentine Dirty Warrior