[1] The 1st Missouri Cavalry Regiment fought at the Battle of Pea Ridge, Arkansas from March 6–8, 1862, then moved east of the Mississippi River and was dismounted.

The 1st/3rd Battalion fought with the Army of Tennessee throughout the Atlanta Campaign and reported 25 killed, 80 wounded, and 3 missing at its end.

On October 5, 1864, the battalion saw action in the Battle of Allatoona, Georgia, where it sustained 56 casualties.

In late 1864, it was part of Hood's operations in Tennessee, and fought at the Battle of Franklin on November 30.

The small command surrendered with the Department of Alabama, Mississippi, and East Louisiana, and was disbanded on May 13, 1865.