Douglas. This destroyed the fragile peace between the North and South that was established by the compromise of 1850. This also brought forward popular sovereignty which allowed settlers in Kansas and Nebraska to decide on slavery for themselves which repealed the Missouri act of 1820. This decision reignited the debate over the expansion of slavery and sparked many violent conflicts between anti-slavery and pro-slavery settlers. One example of this is bleeding Kansas, this happened after the Kansas-Nebraska act and was a time of guerrilla warfare between anti-slavery and pro-slavery settlers in Kansas. One of the most infamous moments of Bleeding Kansas occurred when abolitionist John Brown and his followers forcibly evicted pro-slavery settlers from their homes, resulting in the brutal murder of five individuals. Bleeding Kansas showed the failure of Popular Sovereignty and the tensions between the north and south escalated because of these events. The Republican party was formed in opposition to these events by anti-slavery groups who opposed the expansion of slavery. The Kansas Nebraska act served as a call to people opposing slavery and solidified the political party they were apart of and opposition of the pro-slavery democratic