"Mengistu had built a confinement ward almost to rival Pol Pot’s in the lunatic asylum of communist politics. Far from being controllable, he had used Soviet and Cuban assistance more or less as he liked. The same was true in Afghanistan. Two communist groups, Khalq and Parcham, had existed since the mid-1960s. These were bitter rivals but formed themselve into a united People’s Democratic Party of Afghanistan and campaigned against President Mohammed Daoud and his slow pace of reform. Modernity seemed to be postponed for decades. In April 1978 the Khalq carried out a successful coup against the Daoud government and Khalq leaders Hafizullah Amin and Nur Mohammed Taraki seized power. This came as a surprise to the Kremlin, which had been supporting Daoud. Parcham warned Moscow of the dangers of Khalq extremism. Amin pressed on with executions of the regime’s open enemies. Civil war broke out. Islamist rebellions of the various ethnic groups sprang up everywhere. Amin sought to win support by announcing a campaign for universal literacy and land reform. But little was achievable in an environment of unending violence and social insecurity. Amin had Taraki murdered in October 1979; he was also showing signs of wanting a rapprochement with Washington. It was in this situation of political disintegration and intensifying carnage that the Soviet leadership took its fateful decision to intervene militarily in December."
January 1, 1970
https://en.wikiquote.org/wiki/Hafizullah_Amin