Answer :
The agreement the United States had with Great Britain to sell them weapons and supplies to fight against Germany in World War II was called the "Lend-Lease" program. This program allowed the U.S. to provide military aid to foreign countries during the war, particularly to Great Britain, the Soviet Union, China, and other Allied nations.
Through the Lend-Lease program, the U.S. provided weapons, ammunition, food, and other supplies to its allies without immediate payment but with the understanding that they would be paid back in the future or that the equipment would be returned after the war.
This program was crucial in supporting the Allied war effort by bolstering their military capabilities and helping them resist Axis aggression. The Lend-Lease Act was passed by the U.S. Congress in 1941, and it played a significant role in strengthening the Allied forces against the Axis powers during World War II.