The contested lands were divided between Poland and the Soviet Union after the war ended in 1921, and the Byelorussian SSR became a founding member of the Union of Soviet Socialist Republics in 1922 
 Glad I could help 
 Hello, can you help me learn about Belarus? 
 Do you have any information about their culture? I might visit there and would like to know. 
 Thanks, I love ballet. You've given me all the information I need.
The contested lands were divided between Poland and the Soviet Union after the war ended in 1921, and the Byelorussian SSR became a founding member of the Union of Soviet Socialist Republics in 1922