Question: What is the military power's name formed by the new government of the soviet Union and fought in the the Soviet-Japanese border conflicts among the Soviet Union, mongolia, japan and Manchukuo  in 1939?
Sentence (from "Military history of the Soviet Union"): In 1918 the new government formed the Red Army, which then defeated its various internal enemies in the Russian Civil War of 1917–22.
Relevant evidence: Yes