The U.S. supplied materiel to its allies during WWII through this 1941 Congressional act
[DOC] [TLE] Lend-Lease and Military Aid to the Allies in the Early Years of World ... [PAR] During World War II, the United States began to provide significant military 
supplies and other assistance to the Allies in September 1940, even though the 
United States did not enter the war until December 1941.