on October 24, 1861. The Pony Express ended in just 18 months because it could not compete with the telegraph. Bleeding Kansas Constitutionally, Congress could not deal with slavery in the states but it did have jurisdiction in the western territories. California unanimously rejected slavery in 1850 and became a free state. New Mexico allowed slavery, but it was rarely seen there. Kansas was off-limits to slavery by the Compromise of 1820. Free Soil elements feared that if slavery were allowed rich planters would buy up the best lands and work them with gangs of slaves, leaving little opportunity for free white men to own farms. Few Southern planters were interested in Kansas, but the idea that slavery was illegal there implied they had a second-class status that was intolerable to their sense of honor, and seemed to violate the principle of state's rights. With the passage of the extremely controversial Kansas–Nebraska Act in 1854, Congress left the decision up to the voters on the ground in Kansas. Across the North, a new major party was formed to fight slavery: the Republican Party, with numerous westerners in leadership positions, most notably Abraham Lincoln of Illinois. To influence the territorial decision, anti-slavery elements (also called "Jayhawkers" or "Free-soilers") financed the migration of politically determined settlers. But pro-slavery advocates fought back with pro-slavery settlers from Missouri. Violence on both sides was the result; in all 56 men were killed by the time the violence abated in 1859. By 1860 the pro-slavery forces were in control—but Kansas had only two slaves. The antislavery forces took over by 1861, as Kansas became a free state. The episode demonstrated that a democratic compromise between North and South over slavery was impossible and served to hasten the Civil War. The Civil War in the West Despite its large territory, the trans-Mississippi West had a small population and its wartime story has to a large extent been underplayed in the historiography of the American Civil War. The Trans-Mississippi theater The Confederacy engaged in several important campaigns in the West. However, Kansas, a major area of conflict building up to the war, was the scene of only one battle, at Mine Creek. But its proximity to Confederate lines enabled pro-Confederate guerrillas, such as Quantrill's Raiders, to attack Union strongholds and massacre the residents. In Texas, citizens voted to join the Confederacy; anti-war Germans were hanged. Local troops took