Relations between Pakistan and the Soviet Union fell to a low point following the Soviet Union's military involvement in Afghanistan. Pakistan supported the anti-communist and religious extremist Mujahedeen forces who fought to overthrow the communist Afghan Government, which had usurped power in the Saur revolution in 1978, whereas the Soviets, ostensibly to support the communist People's Democratic Party of Afghanistan, entered Afghanistan, staged a coup, killed Hafizullah Amin, and installed Soviet loyalist Babrak Karmal as leader.