- 
  
  
- 
  
  
- 
  
  
- 
  
  George Washington leads Continental Army to fight against British rule.
- 
  
  
- 
  
  
- 
  
  Britain accepts loss of colonies
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  Partly over the effects of British restrictions on US trade during the Napoleonic Wars.
- 
  
  In wake of Mexican War including California and New Mexico.
- 
  
  
- 
  
  declaring slaves in Confederate states to be free.
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  US enunciates policy of aid for nations it deems threatened by communism
- 
  
  
- 
  
  
-