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, II1., 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.