Babrak Karmal have so far not opted for concrete and constructive positions." During Karmal's rule Afghan–Pakistani relations remained hostile; the Soviet intervention in Afghanistan was the catalyst for the hostile relationship. The increasing numbers of Afghan refugees in Pakistan challenged the PDPA's legitimacy to rule. The Soviet Union threatened in 1985 that it would support the Baloch separatist movement in Pakistan if the Pakistani government continued to aid the mujahideen in Afghanistan. Karmal, problematically for the Soviets, did not want a Soviet withdrawal, and he hampered attempts to improve relations with Pakistan since the Pakistani government had refused to recognise the PDPA
1979 in Afghanistan one time estimated to number 140,000. Amin is overthrown and killed in a coup backed by Soviet troops. Viktor Karpukhin carries out the taking of the presidential palace, in which two Soviet soldiers are killed. Ex-deputy prime minister Karmal, who has been in exile in Czechoslovakia, is picked as Amin's successor. The Soviets have begun a massive military airlift into Kabul, and at least two motorized divisions have crossed the Soviet-Afghan border. Babrak Karmal, whose Parcham party spearheaded the coup against Daud but later lost power to the faction led by Taraki and Amin, is considered more pro-Soviet than Amin