4th Battalion Missouri State Militia Infantry. ("Thompson's.")

Organized for six months at Rockfort, Mo., and mustered in November 9, 1861. Engaged in scouting and guard duty in Holt and Atchison Counties till February, 1862. Mustered out February 11, 1862.

SOURCE: Frederick H. Dyer, A Compendium of the War of the Rebellion, Part 3, p. 1324