Tanks in the Soviet Union on Tajbeg Palace began; as planned, president Hafizullah Amin was killed. The Soviet military command at Termez, Uzbek SSR, announced on Radio Kabul that Afghanistan had been liberated from Amin's rule. According to the Soviet Politburo they were complying with the 1978 "Treaty of Friendship, Cooperation and Good Neighborliness" and Amin had been "executed by a tribunal for his crimes" by the Afghan Revolutionary Central Committee. That committee then elected as head of government former Deputy Prime Minister Babrak Karmal, and said that it had requested Soviet military assistance. Soviet ground forces, under the command of Marshal Sergei Sokolov, entered
Babrak Karmal too communist, and believed that its leadership should have hidden its Marxist orientation instead of promoting it. According to the official version of events, the majority of the PDPA Central Committee rejected Karmal's criticism. The vote was a close one, and it is reported that Taraki expanded the Central Committee to win the vote; this plan resulted in eight of the new members becoming politically unaligned with and one switching to the Parchamite side. Karmal and half the PDPA Central Committee left the PDPA to establish a Parchamite-led PDPA. Officially the split was caused by ideological differences, but the party