He would live the next ten years in Algiers, where he was one of the main voices of a radio station directed to Portugal, Rádio Voz da Liberdade ("Freedom's Voice"), also called "Rádio Argel", from where he reportedly led a series of activities supporting African forces opposing the Portuguese military intervention in the Portuguese Colonial War, including by airing privileged information regarding Portuguese strategy in the theater of war. The distribution of his first books was forbidden by Salazar's government, so they circulated in samizdat form. Alegre returned to Portugal in 1974, one week after the Carnation Revolution.