In 1819, james tallmadge offered an amendment to the bill to allow missouri to join union that gave the people of missouri the right to vote on the issue of slavery forbid slavery in the northwest territory required the inhabitants of the state to sell their slaves forbid the importation of slaves into the new state

  "In 1819, James Tallmadge offered an amendment to the bill to allow Missouri to join Union that forbid the importation of slaves in the new state"

 The Territory of Missouri, to be admitted in the Union had to be a free state, so New York Representative James Tallmadge proposed in 1819 an amendment to the bill for Missouri's statehood with the purpose of no longer introducing slaves into the state and freeing the young slaves born in the state at the age of 25, what would eventually lead to the end of legal slavery.  

 The Senate did not approve the Tallmadge Amendment, later Maine entered as the free state "in place" of Missouri, to balance the proportions of free and slave states in the Union.

abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.

they thoght they were going to nuke each other