Bleeding Kansas: This term refers to a period of intense violence and conflict in Kansas Territory between proslavery and antislavery groups fighting for control over whether slavery should be allowed there.
John Brown: He was an American abolitionist who believed in using armed insurrections to fight against slavery. He played a significant role during Bleeding Kansas and later became notorious for leading a raid at Harpers Ferry.
Abolitionists: Abolitionists were individuals who actively campaigned for the immediate emancipation of slaves. They were against slavery and worked towards its complete eradication from society.