The Soviet Union and its allies refer to the bloc of countries aligned with the USSR during the Cold War, characterized by a communist political system and economic model. This alliance included Eastern European nations such as Poland, East Germany, and Hungary, all of which were influenced by Soviet ideology and often came under its direct control or influence. The cohesion among these states was rooted in their collective opposition to Western capitalism and the promotion of socialist principles, leading to the spread of communism across various regions after 1900.