- 
  
  This act lifted the embargo and put the economic nation under "cash-and-carry". The bans on loans remained.
- 
  
  The Manhattan Project started with scientist including Albert Einstein.
- 
  
  Bacon, butter, and sugar were rationed.
- 
  
  The US froze Japanese assets. On August 1 the US established an embargo on oil and gasoline exports to Japan.
- 
  
  Japanese attack Pearl Harbor, Hawaii.
- 
  
  FDR signed executive order 9066, thus allowing exclusion and internment of Japanese Americans from the west coast of the US.
- 
  
  Occurred in the Pacific theater, US victory. Ended on June 7th.
- 
  
  Allied forces invaded northern France.
- 
  
  Victory in Europe Day.
- 
  
  The American bomber Enola Gay dropped a five-ton bomb over the Japanese city Hiroshima. On August 9th Nagasaki was bombed also.
- 
  
  Victory in Japan Day the Japanese surrender.