On May 1854, The Kansas-Nebraska Act officially became a law when the Senate decided to pass it. This act was proposed by Senator Stephen Douglas which suggested that the Nebraska Territory should be split into two regions where popular sovereignty would decide whether that area should be a free state or a slave state.
This will settle the issue of slavery in both the North and South and bring peace between both sides!
The Kansas-Nebraska Act caused settlers from the north and south to travel to Kansas to hold an election which would discuss the issue of slavery, and if Kansas would be free or not. Unfortunately, on March 1855, David Atchison and "border ruffians" voted illegally to support the proslavery side. In the end, the proslavery side won and more proslavery acts were passed causing abolitionists to create their own government later on.
A violent event that transpired when a proslavery grand jury called antislavery residents in Lawrence, Kansas traitors. As a result, 800 armed men attacked antislavery headquarters, stole from houses and stores, and damaged two newspaper printing presses. Soon the event adopted its name "The Sack of Lawrence" from abolitionist newspapers.
The "Sack of Lawrence" Lawrence, Kansas May 21, 1856
A revenge planned by John Brown, an abolitionist who believed that God had called upon him to fight against slavery. On May 24, 1856 Brown and his followers killed 5 proslavery inhabitants for the 5 antislavery men who were murdered in Lawrence(this was a mistaken idea and rumor). This massacre soon became the catalyst for "Bleeding Kansas".
The "Pottawatomie Massacre" Pottawatomie Creek, Kansas May 24, 1856
After the "Pottawatomie Massacre" many wanted revenge, and soon a series of violent events occurred in Kansas which had killed 200 people. John Brown left Kansas, but he was soon caught and hanged for treason. In addition, Kansas then became a battlefield in the civil war which gave it an infamous name known as "Bleeding Kansas".
After the violent events of "Bleeding Kansas", there was violence in the Senate. Preston Brooks decided to hit Charles Sumner with a cane for attacking his uncle, Andrew P. Butler verbally about proslavery. Reactions from both the south and north were different. The north saw this incident as "southern brutality" while the south praised and supported Brooks actions by giving him more canes.