Kansas City, Missouri
Kansas City is the largest city in the U.S. state of Missouri. According to the U.S. Census Bureau, the city had an estimated population of 488,943 in 2017, making it the 37th most-populous city in the United States. It is the central city of the Kansas City metropolitan area, which straddles the Kansas–Missouri state line. Kansas City was founded in the 1830s as a Missouri River port at its confluence with the Kansas River coming in from the west. On June 1, 1850 the town of Kansas was incorporated; shortly after came the establishment of the Kansas Territory. Confusion between the two ensued and the name Kansas City was assigned to distinguish them soon after.
Kansas Jayhawks
The 160-year-old rivalry between Kansas and Missouri began with open violence that up to the American Civil War known as Bleeding Kansas that took place in the Kansas Territory (Sacking of Lawrence) and the western frontier towns of Missouri throughout the 1850s. The incidents were clashes between pro-slavery factions from both states and anti-slavery Kansans to influence whether Kansas would enter the Union as a free or slave state. In the opening year of the war, six Missouri towns (the largest being Osceola) and large swaths of the western Missouri country side were plundered and burned by guerrilla "Jayhawkers" from Kansas. The Sacking of Osceola led to a retaliatory raid on Lawrence, Kansas two years later known as the Lawrence Massacre killing between 185 and 200 men and boys, which in turn led to the infamous General Order No. 11 (1863), the forced depopulation of several western Missouri counties. The raid on Lawrence was led by William Quantrill, a Confederate guerrilla born in Ohio who had formed his bushwhacker group at the end of 1861. At the time the Civil War broke out, Quantrill was a resident of Lawrence, Kansas teaching school.