What year did mr mikhail gorbachev become an politburo?

Mikhail Gorbachev became a member of the Politburo of the Communist Party of the Soviet Union in 1980. He was appointed to the Politburo during a time of significant political and economic challenges within the Soviet Union, eventually rising to the position of General Secretary in 1985. His leadership marked a pivotal shift in Soviet policies and the eventual end of the Cold War.