Babrak Karmal befriended fellow inmate Mir Akbar Khyber, who introduced Karmal to Marxism. Karmal changed his name from Sultan Hussein to Babrak Karmal, which means "Comrade of the Workers'" in Pashtun, to disassociate himself from his bourgeois background. When he was released from prison, he continued his activities in the student union, and began to promote Marxism. Karmal spent the rest of the 1950s and the early 1960s becoming involved with Marxist organizations, of which there were at least four in Afghanistan at the time; two of the four were established by Karmal. When the 1964 Afghan Provisional Constitution, which legalised the
Assadullah Sarwari Asadullah Amin in October 1979. In September 1979 Sarwari was involved in a pro-Nur Muhammad Taraki plot to oust Prime Minister Hafizullah Amin. After the failure of the plot, he and his comrades (the 'Gang of Four') escaped to the Soviet Embassy, where he was given asylum until the Soviet invasion and the fall of Amin in December 1979. After the invasion, under the government of Babrak Karmal, Sarwari was first given the task of deputy prime minister, but he was soon removed from the government and posted as ambassador to Mongolia from 1980 to 1986. In January 1980, Sarwari