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  The United States Began To Expand Into Mexican Territory. Resulted In Mexico's Defeat And The Loss Of Half Of Their Territory.
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  Mexico Agrees To Give Up Their Land
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  Zachary Taylor Is Elceted Presdient
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  Taylor threatened to veto the Compromise of 1850 even at the risk of civil war.Taylor died. Millard Fillmore became President.
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  Helped Determine The Future Of Future States Westward. Free or Slave
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  Presidental Election Held. Franklin Pierce became President
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  Pottawatomie Massacre: The massacre, led by John Brown, took place.
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  U.S. presidential election, 1856: An election was held.
1857 James Buchanan became President. - 
  
  A decision in Dred Scott v. Sandford declared that blacks were not citizens of the United States and could not sue.
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  United States presidential election, 1860: Abraham Lincoln was elected President of the United States
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  South Carolina seceded from the Union
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  Ten more states seceded from the Union and established the Confederate States of America.
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  First battle between the North and The South
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  The North and The South Go To War