- 
  
  World War II began on september 1, 1939 When Germany invasdes Poland.
- 
  
  September 17, 1939
 The Soviet Union invades Poland from the east.
- 
  
  April 9 –June 9
 Germany invades Denmark and Norway. Denmark surrenders on the day of the attack; Norway holds out until June 9.
- 
  
  Italy enters the war an invades France on June 21st
- 
  
  Japan bombs Pearl Harbor.
- 
  
  The United States declares war on Japan, entering World War II.
- 
  
  US and British troops land on Sicily. By mid-August, the Allies control Sicily.
- 
  
  Soviet troops liberate Kiev.
- 
  
  US troops land in the Philippines.
- 
  
  The United States drops an atomic bomb on Hiroshima.
- 
  
  Having agreed in principle to unconditional surrender on August 14, 1945, Japan formally surrenders, ending World War II.
