The vicious guerrilla war in Missouri spills over into Kansas and precipitates one of the most appalling acts of violence during the war when Southern partisans [raid the abolitionist town](http://150 men in the) of Lawrence, Kansas and murder 150 men.
The Civil War took a very different form in Kansas and Missouri than it did throughout the rest of the nation. There were few regular armies operating there; instead, partisan bands attacked civilians and each other. The roots of conflict in the region dated back to 1854, when the Kansas-Missouri border became ground zero for tension over slavery. While residents of Kansas Territory were trying to decide the issue of slavery, bands from Missouri, a slave state, began attacking abolitionist settlements in the territory. Abolitionists reacted with equal vigor.