- 
  
  The purchase of Louisiana from France started westward exploration by pioneers like Lewis and Clark.
- 
  
  The war of 1812 was between United states and the United Kingdom.
- 
  
  Henry Clay worked out the Missouri Compromise which allowed Maine to join the Union as a free state and Missouri as a slave state.
- 
  
  After winning the War of 1812, the U.S. wrote the Monroe Doctrine to warn Europeans not to try and colonize America.
- 
  
  The Native Americans were being forced to move from their ancestral homelands.
- 
  
  
- 
  
  This overturned the Missouri Compromise and left the issue of slavery unsettled
- 
  
  This act required residents and governments of free states to capture and return escaped slaves to their owners.
- 
  
  President Abraham Lincoln goes to war with the southern states that seceded from the Union.
- 
  
  While attending a play in Washington D.C, Lincoln was assassinated by John Wilkes Booth.
- 
  
  After four years of conflict, General Robert E. Lee surrendered to Ulysses S. Grant in Virginia.
- 
  
  The 14 amendment made all former slaves U.S citizens and guaranteed all citizens equal protection of the laws.