A line on the 36 30 latitude line that prohibited slavery in the north.
The Dred Scott Decision
1847 - 1857
It was a decision by the US Supreme Court and it said that the government couldn't regulate slavery in the territories. It also said black people weren't protected by the Constitution and they were not US citizens.
The Republican Party
1854 - 2013
The Republican Party was created by people in the north that were committed to stopping expansion of slavery into the territories.
The election of 1860
1859 - 1860
Abraham Lincoln was voted to be the president of the US.
Creation of Confederate States
Most southern states seceded from the US making a little "country" called the Confederacy.
The Civil War
1861 - 1865
The war fought between the Confederacy and the Union.