They revolted against Gorbachev's leadership.
Explanation:
The general communist public was unhappy that Gorbachev was allowing the Eastern European countries the Independence they wanted from the grasp of Soviet Union and the leader faced a lot of criticism due to that fact.
Gorbachev was willing to dissolve the soviet union for the sake of the people but the supporters of the communist party were less enthralled with the idea of other free nations being carved out.
