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        On July 4,1809. Thomas Jefferson becomes the 3rd President, and was President up until 1809 - 
  
  
        On April 30, 1803 Thomas Jefferson bought Lousiana from France, which helped double the size of the country - 
  
  
        In a transaction with France the US purchased 828,000 square miles of land west of the Mississippi River for $15 million - 
  
  
        On March 3, 1820, the Missouri Compromise was created. The Missouri Compromise helped hold the union together, and balanced the practice of enslavement - 
  
  
        On March 15, 1820 Maine was added to the union and was the 23rd state. - 
  
  
        March 6, 1836, a battle for Texas independence against Mexican Army took place at the Alamo. - 
  
  
        California became the 31st state on September 9, 1850. While the land was never organized as a territory, it was administered by a federal military authority. - 
  
  
        Over 300 bridges needed to be built aloung the route, it was built and financed by private companies from the United States. - 
  
  
        On April 14, 1865 President Abraham Lincoln was assassinated only five days after the American Civil War ended. - 
  
  
        On March 4, 1869 Ulyssess S.Grant became the 18th President of the United States. He was also a hero in the Civil War,