Answer: The major purpose of the Lend-Lease Act of 1941 was to promote the defense of the United States.
Explanation: The Lend-Lease Act was formally known as an act to promote the defense of the United States and was officially passed on March 11, 1941. Endorsed by the President Franklin D. Roosevelt and confirmation by the legislation, the act allowed military aid and supplies to be offered to other nations around the world.