John Brown was one.
Abolitionist
Liam Neeson.
criminal
An abolitionist was a person who wanted to "abolish" slavery, eliminating it from society. They were more numerous in the North before the US Civil War (1861-1865), but still constituted a small, vocal minority. Some, such as John Brown, tried to force the freedom of slaves by armed action. He and his supporters killed some slave owners and later attacked the Federal armory at Harper's Ferry on October 16, 1859. His plan to arm and lead a slave revolt failed, and Brown was tried and hanged.
Life in the south was pure slavery for African Americans and if they tried to escape they'd be tortured like this answer
criminal
He tried to end slavery. ------------- he triggered the beginning of the civil war. He might not have ended it but he certainly started the war that ended it
Buchanan
they tried to get rid of slavery
The Civil War that tried to make the south to be anti-slavery but still be in the Unites States Union.
January, 1863 is when they tried to end slavery.
He was the commandant of the Andersonville prisoner of war camp and the first person to be tried for war crimes after the Civil War.