The Communist Party of Brazil (Portuguese: Partido Comunista do Brasil, PCdoB) is a communist and Marxist–Leninist political party in Brazil. It has national reach and deep penetration in the trade union and students movements. PCdoB shares the disputed title of "oldest political party in Brazil" with the Brazilian Communist Party (PCB). The predecessor of both parties was the Brazilian Section of the Communist International, founded on March 25, 1922. The current PCdoB was launched on February 18, 1962, in the aftermath of the Sino-Soviet split. Outlawed after the 1964 coup d'état, PCdoB supported the armed struggle against the regime before its legalization in 1988. Its most famous action in the period was the Araguaia guerrilla (1966–1974). Since 1989, PCdoB has been allied to the Worke