The agreement that ended the Soviet Union in 1991 was a defining moment in 20th-century history. This agreement, known as the Belavezha Accords, effectively dissolved the Union of Soviet Socialist Republics (USSR) and ended the Cold War era. The Belavezha Accords were signed on December 8, 1991, by the leaders of three of the Soviet Union`s constituent republics: Russia, Ukraine, and Belarus....