The Second Brazilian Republic was marked by political instability and military's pressure on civilian politicians which ended with the 1964 Brazilian coup d'état and establishment of Brazilian military government. In 1945, President Getúlio Vargas was deposed by a bloodless military coup, but his influence in Brazilian politics remained until the end of the Second Republic. During this period, three parties dominated national politics. Two of them were pro-Vargas — the Brazilian Labour Party ("Partido Trabalhista Brasileiro, PTB") to the left and the Social Democratic Party ("Partido social Democrático, PSD") in the center — and another anti-Vargas, the rightist National Democratic Union ("União Democrática Nacional, UDN").