The Soviet Union was a large country that existed from 1922 to 1991, made up of multiple republics, with Russia being the largest. It was a communist state, meaning the government controlled the economy and aimed to create a classless society. The Soviet Union played a significant role in world events, especially during the Cold War, when it competed with the United States for global influence. The Soviet Union was known for its achievements in space exploration, including launching the first human, Yuri Gagarin, into space in 1961. However, it also faced many challenges, such as economic struggles and political repression. Ultimately, the Soviet Union dissolved in 1991, leading to the independence of its republics.