The 4th Military District is comprised of:

1. 4th Military District Headquarters Company
2. Co. C, 34th Illinois Volunteer Infantry Regiment
3. Co. A, 3rd Battery Iowa Light Artillery
4. Co. F. 3rd Iowa Volunteer Infantry
5. Co. B, 10th Iowa Volunteer Infantry
6. Co. B, 20th Iowa Volunteer Infantry
7. Co. A, 37th Iowa Volunteer Infantry
8. Co. A, 49th Iowa Volunteer Infantry
9. Co. A., 1st Regt. Missouri Engineers
10. 1st Missouri State Militia Infantry, Columbia Tigers
11. Co. M, 1st Missouri Light Artillery
12. Co. A, 2nd Missouri Infantry
13. Co. C, 5th Missouri Cavalry
14. Co. E, 47th Missouri Volunteer Infantry
15. Co. F, 78th Enrolled Missouri Militia
16. Nebraska Rangers
17. Co. B, 28th Wisconsin Volunteer Infantry
18. Cushing's Battery (Battery A, 4th U.S. LA)
19. Mulligan's Battery (Battery L, 1st Illinois LA)
20. Ship's Company, USS Carondelet
21. Rockford Zouaves
22. Battery K, 4th U.S. Light Artillery
23. Co. D, Phelps Regiment

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