Flag of Union of Soviet Socialist Republics Britannica
Jul 28, 2020· The Union of Soviet Socialist Republics (U.S.S.R., or Soviet Union) was created on December 31, 1922. The Soviet constitution mandated the national flag’s design, and that flag, with minor modifications, was effective from January 31, 1924, to the formal dissolution of the Soviet Union on December 31, 1991 (although the Russian flag replaced