What is one reason that stalin refused to relinquish control of eastern europe after the world war 2?

One reason Stalin refused to relinquish control of Eastern Europe after World War II was to establish a buffer zone of friendly communist states to protect the Soviet Union from potential future invasions. He believed that having these satellite states would enhance Soviet security and influence in the region, particularly in light of the historical invasions from the West. Additionally, consolidating control over Eastern Europe allowed Stalin to spread communist ideology and strengthen the Soviet bloc against Western powers.