What role did the united states play in the european conflict before december 7, 1941? totally isolationist fully committed military ally supplier of loans and war materials to the allies leader of the allied forces supporter of the communist regime of the soviet union?

Supplier of loans and war materials to the allies.

The United States was neutral until attack at Pearl Harbor. USA sold weapons, raw materials, oil and old war ships to Britain. USA also gave loans to Britain and the Soviet Union, but did not participate in conflict against Nazi German.