The Association of Diplomatic Studies and Training has posted a history of the development of Brazilian democracy.
Brazil’s path to democracy was far from perfect and often tortuous. In 1961, a “possibly half insane” Janio Quadros was elected to the presidency. One of his more miscalculated moves was to threaten resignation if Congress did not give him more power. Congress instead accepted his resignation, and his successor, Joao “Jango” Goulart became President. Goulart, however, was much too leftist for most people and on March 31st 1964, he was overthrown by Brazil’s Armed Forces; U.S. involvement was suspected, but denied by Ambassador Lincoln Gordon. What followed was a military dictatorship that ruled for twenty years with an iron fist, often torturing its own citizens under the guise of maintaining order.