What historical events contributed to the soviet union desire to control the nations on its western border?

The Soviet Union's desire to control nations on its western border was influenced by several historical events, including the invasions of Russia during World War I and World War II, particularly the Nazi invasion in 1941. The Bolshevik Revolution also instilled a fear of capitalist encroachment, prompting the USSR to seek buffer states to prevent future invasions. Additionally, the USSR aimed to spread communism and ensure that neighboring countries were aligned with Soviet interests, which further motivated its control over Eastern Europe.