George W. Hummel/Hummell served in a series of closely related units with origins in southeast Missouri, including the Fremont Rangers; Co. A, 11th MSM Cavalry Battalion; Co. A, 12th MSM Cavalry Regiment; and Co. K, 3rd MSM Cavalry (New).

You should be able to find out a bit on him in the O.R. You can also read up on him here -- http://civilwarstlouis.com/JacksonFairgrounds/index.htm