After the passing of Kansas-Nebraska Act in 1854, elections were held for a territorial legislature in Kansas, which included the idea of popular sovereignty. Then, the pro-slavery members attacked Lawrence; this triggered the rise of John Brown, a radical abolitionist who contributed to the major violent conflicts during “Bleeding Kansas”
With private encouragement and financial aid from some prominent abolitionists, Brown made elaborate plans to seize a mountain fortress in Virginia, which he believed would cause a slave insurrection in the South
On October 16, Brown and a group of 18 followers attacked and seized control of a U.S. arsenal in Harper Ferry, Virginia. However, the slave uprising that Brown hoped to inspire, did not occur.
Where's the uprising at?
Brown quickly found himself besieged in the arsenal by citizens, local militia, and U.S. troops commanded by Robert E. Lee. After his sons and ten other men of his were killed, Brown surrendered.
I think I'm done.
Brown was promptly tried in a Virginia Court for treason and sentenced to death along with 6 of his followers; the event, however, made the southerners feel unsafe in the divided nation.
Although false, many southerners believed that John Brown's raid had the support of the Republican Party, and it suggested to them that the North was now committed to producing a slave insurrection to counter the expansion of slavery. Brown's raid, the divided view on Dred Scott decision, and emergence of highly supported Republican Party, and election of Lincoln contributed to the catalyst of the secession of the South