In the spring of 1941, president franklin
d. roosevelt signed into law a bill which allowed him to sell, loan, or give war material to countries for their defense against axis forces. this bill was known as the

It was the Lend-Lease Act, this enabled the United States to provide assistance to the allies before they entered the war.  They would lend or lease weapons and supplies to the allies so they could continue to oppose German expansion.  Later on, the U.S. entered World War II on the side of the allies.

the only true answer is that it expanded after 325 ad.