People forget there were a ton of troops and supplies tied up in
Missouri in the war. Without that, war might have been over faster.
Wasn't the nicest war either, on either side. Bloody Kansas wasn't
just an adjective. Both sides were pretty bad, once the Union came in,
lots of farms were burned, families were moved, wives were locked up
in jail (and in one case died with the building collapsed - leading to
reprisals by the Confederates).

There were numerous Civil War battles in Missouri, the entire length
and breadth of the state. Back in the days when an army moved on its
feet.

In the opening days, Bluebellies got whupped. Came from St Louis and
moved to Jefferson City, ran back.