Organized at Peoria, Ill., and mustered in May 24, 1861. Moved to Alton, Ill., June 17, 1861, thence to St. Charles and Warrenton, Mo., July 27. Moved to Bird's Point, Mo., August. Duty there, at Fort Holt, Ky., and Cape Girardeau, Mo., till February, 1862. Attached to District of Cairo to October, 1861. 5th Brigade, District of Cairo, to February, 1862. 3rd Brigade, 1st Division, District of Cairo, February, 1862. 3rd Brigade, 1st Division, District of West Tennessee, and Army of the Tennessee, to July, 1862. 3rd Brigade, 1st Division, District of Jackson, Tenn., to September, 1862. Unattached, District of Jackson, Tenn., to November, 1862. 4th Brigade, 3rd Division, Right Wing 13th Army Corps, Dept. of the Tennessee, November, 1862. 1st Brigade, 6th Division, 16th Army Corps, Army of the Tennessee, to January, 1863. 1st Brigade, 6th Division, 17th Army Corps, to July, 1863. 3rd Brigade, 3rd Division, 17th Army Corps, to April, 1864. Maltby's Brigade, District of Vicksburg, Miss., to June, 1864.
SERVICE - Operations about Ironton and Fredericktown, Mo., against Thompson's forces October 12-25, 1861. Action at Fredericktown October 21. EXpedition to Benton, Bloomfield and Dallas January 15-17, 1862. Operations against Fort Henry, Tenn., February 2-6. Investment and capture of Fort Donelson, Tenn., February 12-16. Moved to Savannah, thence to Pittsburg Landing, Tenn., March 5-25. Battle of Shiloh, Tenn., April 6-7. Advance on and siege of Corinth, Miss., April 29-May 30. March to Jackson June 5-8, and duty there till July 17. At Bolivar, Tenn., till November. Expedition to Iuka September 15-22. Grant's Central Mississippi Campaign November, 1862, to January, 1863. Reconnoissance from LaGrange November 8-9, 1862. Moved to Memphis, Tenn., January 12, 1863, thence to Lake Providence, La., January 17-24. Action at Richmond, La., January 29-30. Old River, Lake Providence, February 10. Moved to Milliken's Bend April 12. Movement on Bruinsburg and turning Grand Gulf April 25-30. Battles of Thompson's Hill, Port Gibson, May 1. Bayou Pierrie May 2. Raymond May 12. Jackson, Miss., May 14. Champion's Hill May 16. Big Black River May 17. Siege of Vicksburg, Miss., May 18-July 4. Assaults on Vicksburg May 19 and 22. Surrender of Vicksburg July 4. Garrison duty at Vicksburg till May, 1864. EXpedition to Monroe, La., August 20-September 2, 1863. Expedition to Canton October 14-20. Bogue Chitto Creek October 17. Expedition from Vicksburg to Sunnyside Landing, Ark., January 10-16, 1864. Meridian Campaign February 3-March 2, 1864. Clinton February 5.
Mustered out June 4, 1864, expiration of term. Veterans and Recruits transferred to 8th Illinois Infantry.
Regiment lost during service 3 Officers and 71 Enlisted men killed and mortally wounded and 1 Officer and 71 Enlisted men by disease. Total 146.