In 1991, the USSR was on the verge of being decomposed into 15 independent countries. It was then a federation of 15 soviet republics. Its borders had been unchanged since the end of World War 2, when the Baltic States and Bessarabia were integrated as the newest republics: Lithuania, Latvia, Estonia and Moldavia. Also, the Northern half of previously German province of East Prussia was annexed as the Kaliningrad Region of the Russian Republic.
The USSR in 1991
