The USSR was formed in 1922 and dissolved in 1991. The term USSR stands for the Union of Soviet Socialist Republics, which was a federal socialist state in Eastern Europe and parts of Asia. There are several other synonymous terms for the USSR, including Soviet Union, Soviet Russia, Red Russia, and the Union of Soviet Republics. These terms were widely used during the period of Soviet rule and continue to be used today. The use of these synonymous terms helps to reflect the complex political history of the USSR and the intricacies of the Soviet era. They are often employed in historical accounts, political discussions, and cultural references to the Soviet Union.