After the World War Two, the USSR had gained control over the Eastern Europe It's a name and thus doesn't take an article. In the beginning Stalin was willing to accept a coalition government for several years, tell me because of Potsdam/Yaltabut the tension that are generated by the Cold War forced these countries to accept communist system. This was deeply influenced by the international relation and situation between the USSR and the West including the US. Red army has stayed in those countries and Stalin concerned about the security of the USSR. The USSR has successfully, even though there were a few uprisings, controlled these states until 1980's through political, economic and military impacts.
Politically, many methods were used to maintain communism in Eastern Europe by the USSR, such as using Salami Tactics to encourage communist parties gain control over the governments. …
