The document examines the factors leading up to the Soviet invasion of Afghanistan in 1979. It provides background on Afghanistan's relationship with the Soviet Union and discusses the coup in 1978 that killed the Afghan president. It then outlines the power struggle between factions of the ruling communist party, growing unrest over reforms, and the requests from the Afghan government for Soviet assistance. By late 1979, the Soviet Politburo decided to send troops to restore order and replace the Afghan leader, marking the beginning of the Soviet invasion and occupation of Afghanistan.