He reached the position after the resignation of Babrak Karmal[1]. A non-party member, a tribal leader with power and connections in key areas of provinces bordering Pakistan, his influence extended inside Pakistan as well. However, Mohammed Najibullah was in charge of the country, due to his powerful positions of Director of the KHAD and General Secretary of the People's Democratic Party of Afghanistan.
It was during his term in office that the USSR indicated willingness to negotiate and remove some troops from Afghanistan. His term was also marked by the creation of a new Constitution.
References
^ "Afghan Tribal Leader Named Acting President." (24 November 1986). New York Times. Section A.