Answer:
The Soviet Union never joined the Axis powers and only agreed to form a non-aggression pact with Germany and Japan but did not join a military or political alliance.
Step-by-step explanation:
The Soviets had joined the Allies due to Germany's surprise invasion of the Soviet Union. France at that time had been under Nazi occupation already and Britain was struggling to fend off German aircraft attacking British cities. The reason the Soviet Union joined the Allies so the Soviet Union can gain help if the Allies ever opened another front which D-day allowed.