Answer:
They were both members of the Allies.
Explanation:
The Soviet Union (USSR) and the United States (US) were both members of the Allies during World War II.
USSR was part of the Axis alliance until Germany enacted Operation Barbarossa, which was a surprise invasion of the USSR. This in turn made the USSR join the Allies.
The US joined the Allied side first as a supplier of goods through the Lend-Lease Act, and joined the war later militarily after the Battle of Pearl Harbor.
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