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.

Question: What happened as a result of the war
Self-contained rewrite: What happened in the U.S. as a result of the war in 1941