The U.S. supplied materiel to its allies during WWII through this 1941 Congressional act
.... to the Lend-Lease bill was strongest among isolationist 
Republicans in Congress, ... Value of materials supplied by the USA to other 
allied nations... [DOC] [TLE] Lend-Lease Act - World War II - HISTORY.com [PAR] Proposed in late 1940 and passed in March 1941, the Lend-Lease Act was the 
principal means for providing U.S. military aid to foreign nations during World 
War II.