After a long military career in the Portuguese Colonial Wars, he was stationed in Portuguese Angola when the 25 April revolution of 1974 took place. He joined the Movimento das Forças Armadas (MFA or Armed Forces Movement) and after returning to Portugal, he was made president of RTP (Portuguese public television). He ordered the military operations against the pro-communist radical faction of the MFA on 25 November 1975, an event known as the 25 de Novembro, ending that year's "hot summer" ("Verão quente").