Up to 1965, there were three main parties in Brazil: the left-wing populist Brazilian Labour Party (PTB), the centrist Social Democratic Party (PSD) and the conservative National Democratic Union (UDN). In 1964, the government of President João Goulart was overthrown by a military coup d'etat, but in contrast to other Latin American dictatorships, the Brazilian military-controlled government did not abolish Congress. Instead, in 1965, the government banned all existing political parties and created a two-party system. ARENA, the pro-government party, was formed by politicians from the bulk of the UDN, the right wing of the PSD, and the bulk of the integralist Party of Popular Representation. The main body of the PSD joined most of the PTB in forming the Brazilian Democratic Movement (MDB), the opposition.