In the Civil War, Missouri was a border state that sent men, armies, generals, and supplies to both opposing sides, had its star on both flags, had separate governments representing each side, and endured a neighbor-against-neighbor intrastate war within the larger national war. By the end of the Civil War Missouri had supplied nearly 110,000 troops to the Union and about 40,000 troops for the Confederate Army. There were battles and skirmishes in all areas of the state, from the Iowa and Illinois border in the northeast to the edge of the state in the southeast and southwest on the Arkansas border. Counting minor engagements, actions and skirmishes, Missouri saw over 1,200 distinct fights. Only Virginia and Tennessee exceeded Missouri in the number of clashes within the state boundaries. The first major Civil War battle west of the Mississippi River was on August 10, 1861 at Wilson's Creek, Missouri, whereas the largest battle in the war west of the Mississippi River was the Battle of Westport at Kansas City in 1864.
Info from
http://en.wikipedia.org/wiki/Missouri_in_the_American_Civil_War
