Kansas City (often referred to as K.C.) is the most populous city in the U.S. state of Missouri. In 2010, it had a population of 459,787, which had risen to an estimated 467,007 in 2013.
The Kansas City metropolitan area, the second largest in Missouri after St. Louis spans the Kansas–Missouri border. On the western border of Missouri, with downtown near the confluence of the Kansas and Missouri rivers, Kansas City encompasses 316 square miles in Jackson, Clay, Cass, and Plattecounties. It is one of two county seats of Jackson County, along with Independence.
Founded in the 1830s as a port on the Missouri River, Kansas City experienced clashes over slavery in the Border War which preceded the American Civil War and in that war itself, including the Battle of Westport.