He became the general secretary of the Soviet Union. While in office, he changed the way the Soviet Union did things by taking away the Iron Curtain and bringing forth new political ideas and programs.
Ok class, next question. who was Mikhail S. Gorbachev, and what did he accomplish?
One thing he accomplished was Glasnost, which meant that the Soviet Union could openly talk about social and political issues. Another thing he imposed was perestroika, which is the reestablishment of the Soviet Union's policies. This is what started democracy in the Soviet Union, and eventually ended the Cold War.