Final answer:
FDR helped Great Britain before the U.S. entered World War II by allowing credit purchases of military equipment and implementing the lend-lease program.
Step-by-step explanation:
Before the United States entered World War II, FDR helped Great Britain by allowing them to purchase military equipment directly from U.S. manufacturers on credit and by implementing the "lend-lease" program to provide the British military supplies without having to pay.
Learn more about FDR's assistance to Great Britain before U.S. entry into World War II