O'Harnett's Independent Cavalry Comp'y

Organized at Camp Butler, Ills., with 30th Illinois Infantry, and mustered in August 28, 1861. Moved to Cairo, Ills., September 1, 1861. Attached to Military District of Cairo to February, 1862. 1st Brigade, 1st Division, Army of the Tennessee, to July, 1862.

SERVICE.--Duty in the Military District of Cairo, September, 1861, to February, 1862. Expedition from Cairo into Kentucky January 16-21, 1862. Operations against Fort Henry, Tenn., February 2-6. Investment and capture of Fort Donelson, Tenn., February 12-16. Moved to Pittsburg Landing March 6-13. Battle of Shiloh, Tenn, April 6-7. Advance on and Siege of Corinth, Miss., April 29-May 30. Raid on Mobile and Ohio R. R. and skirmish at Purdy, Tenn., May 7. Moved to Bethel and Jackson, Tenn., June 4-7 and duty there till July. Assigned to Stewart's Illinois Cavalry Battalion July, 1862, which see.

SOURCE: Frederick H. Dyer, A Compendium of the War of the Rebellion, Part 3, p. 1034

Stewart’s Independent Cavalry Battalion.

Organized at Jackson, Tenn., by consolidation of Stewart's Independent Company Cavalry, organized at Cape Girardeau, Mo., August 10, 1861, as Company "A;" Carmichael's Independent Cavalry Company, organized at Cairo, IIl., August 19, 1861, as Company "B;" Dollins' Independent Cavalry Company, organized at Cairo, Ill., August 27, 1861, as Company "C;" O'Harnett's Independent Cavalry Company, organized at Springfield, Ill., September 16, 1861, as Company "D"; Hutchins' Independent Cavalry Company, organized June 26, 1861, as Company "E." Attached to Districts of Jackson, Tenn., and Corinth, Miss., to November, 1862. District of Corinth, 13th Army Corps (Old), Department of the Tennessee, to December, 1862.

SERVICE.--Duty in the Districts of Jackson, Tenn., and Corinth, Miss., Dept. of the Tennessee, to December, 1862. Action at Toone's Station, on Lower Post Ferry, Tenn., July 27, 1862. Near Humboldt, Tenn., July 28. Hatchie Bottom, near Denmark, July 29. Grant's Central Mississippi Campaign, November-December. Operations against Forrest in West Tennessee December 18, 1862, to January 3, 1863. Transferred to 15th Illinois Cavalry December 25, 1862, as Companies "A," "B," "C," "D," "E" and "F," which see.

SOURCE: Frederick H. Dyer, A Compendium of the War of the Rebellion, Part 3, p. 1032