Organized at Aurora, Ills., as Cavalry Company "A," 36th Illinois, and mustered in September 23, 1861. Moved to St. Louis, Mo., thence to Rolla, Mo., September 24-29, and duty there until January, 1862. Attached to 2nd Brigade, Army of Southwest Missouri, to June, 1862. Cavalry Army of Mississippi to October, 1862. 1st Brigade, 2nd Division, Army Mississippi, to November, 1862. District of Corinth, Miss., 13th Army Corps (Old), Dept. of the Tennessee, to December, 1862.

SERVICE - Expedition against Freeman's Forces November 1-9, 1861. Curtis' Campaign in Missouri and Arkansas against Price, February and March, 1862. Advance on Springfield, Mo., February 2-13. Pursuit of Price into Arkansas February 14-29. Battles of Pea Ridge, Ark., March 6-8. At Keytesville until April 5. March to Batesville April 5-May 3. Moved to Cape Girardeau, Mo., May 11-22, thence to Hamburg Landing, Tenn., May 23-29. Occupation of Corinth, Miss., May 30, and pursuit to Booneville May 30-June 6. Duty at Rienzi until September. Battle of Iuka, Miss., September 10. Battle of Corinth, Miss., October 3-4. Pursuit to Hatchie River October 5-12. Grant's Mississippi Central Campaign November-December. Assigned to 15th Illinois Cavalry as Company I December 25, 1862. See 15th Cavalry.