Conversation so far:
What happened in 1940 during the Great Depression
U.S. began sending arms to Britain. Defense budget increased.  income tax rose to 81%. The economy grew 8.8%. Unemployment fell 14.6%. Prices rose 0.7%. The debt rose to $51 billion.
What happened in 1941
The U.S. declared war on Japan after Pearl Harbor was attacked in 1941.
What happened in the U.S. as a result of the war in 1941
The economy grew 17.7%, unemployment plummeted to 9.9%, and prices rose 9.9%. The debt grew to $58 billion. FDR created the greatest percentage increase in U.S. debt by a president.

Question: When did the war end
Self-contained rewrite: When did the war that started in 1941 end