The geographic center of Kansas is in Barton County.Kansas is underlain by a sequence of horizontal to gently westward dipping sedimentary rocks.
The secondary settlement of Americans in Kansas Territory were abolitionists from Massachusetts and other Free-Staters, who attempted to stop the spread of slavery from neighboring Missouri.
Southwest Kansas, however, was still a part of Spain, Mexico, and the Republic of Texas until the conclusion of the Mexican–American War in 1848, when these lands were ceded to the United States.
From 1812 to 1821, Kansas was part of the Missouri Territory.
Directly presaging the American Civil War, these forces collided, entering into skirmishes that earned the territory the name of Bleeding Kansas.
Kansas was admitted to the Union as a free state on January 29, 1861, making it the 34th state to join the United States.
By 2015, Kansas was one of the most productive agricultural states, producing high yields of wheat, corn, sorghum, and soybeans.) is the 15th-largest state by area and is the 34th most-populous of the 50 states with a population of 2,911,641. Mount Sunflower is Kansas' highest point at 4,041 feet (1,232 m).