- 
  
  which stronger nations extend their economic, political, or military control over weaker nations or territories
 - 
  
  the transition of replacing hand tools with factory machines
 - 
  
  the proccess the federal government used to readmit the confederate states to the Union.
 - 
  
  
 - 
  
  when the U.S. demanded cubas independence from spain
 - 
  
  there were a bunch of alliances messed up
 - 
  
  when alcohol was banned
 - 
  
  economy would go down in the market. Everything dropped and jobs were lost
 - 
  
  
 - 
  
  a naval base in hawaii that was hit in a surprise attack by japan
 - 
  
  era of tension and hostility between the United states and the soviet union
 - 
  
  north korea invaded south korea
 - 
  
  The U.S. wanted to stop communists from taking over south vietnam
 - 
  
  U.S.'s response to Iraq's invasion on Kuwait
 - 
  
  when Osama bin laden attacked the twin towers and killed thousand of american citizens
 - 
  
  the whole world was awakened by Osama bin ladens surprise terror attack
 - 
  
  Trying to have peace between the U.S. and iraq. We invade them so the war stops.
 - 
  
  it is an operation for freedom in iraq