During which year (s) did the Russian army withdraw from the Caucasus front ?
11th Army ( Soviet Union ) ( 1918-1921 ) , formed October 3 1918 from the Northern Caucasus Army Its successor , the Red Banner Caucasus Army ( 1921-1935 ) , which was named the Independent Caucasus Army until August 1923 Its successor , the Transcaucasian Military District Transcaucasian Front , a Soviet army group of World War II Caucasus Front , a Soviet army group of World War II