United States Regiments & Batteries > Illinois
The 23rd Illinois Volunteer Infantry Regiment lost 4 officers and 50 enlisted men killed or mortally wounded and 2 officers and 93 enlisted men to disease during the Civil War.
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1861
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| Organized at Chicago, Ill. | |
| June 15 | Mustered in |
| July 14 | Moved to Quincy, Ill. |
| July 21 | To St. Louis, Mo., and to Jefferson City |
| September 8-11 | March to Lexington |
| September 12-20 | Siege of Lexington |
| September 20 | Captured by Price and paroled. |
| October 8 | Regiment mustered out by order of General Fremont |
| December 10 | Restored by order of General McClellan |
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1862
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| December-June | Reassembled at Chicago and assigned to guard prisoners at Camp Douglas |
| June 14 | Moved to Harper’s Ferry. Attached to R. R. District, Mountain Department, Harper’s Ferry and New Creek. |
| July | Duty at New Creek, Va. assigned to R. R. District, 8th Army Corps, Middle Department |
| September | Assigned to R. R. District West Va. |
| September 1 | Relief of Clarksburg, Va. |
| September 3 | Relief of Parkersburg |
| November 9 | Action at Moorefield, South Fork of the Potomac (Companies B, D, K). |
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1863
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| January | Assigned to New Creek, Va., Defenses Upper Potomac, 8th Army Corps, Middle Department |
| January 3-4 | Relief of Colonel Washburn at Moorefield |
| March | Assigned to 5th Brigade, 1st Division, 8th Army Corps |
| April 25 | Moved to Grafton |
| April 25 | Company G in skirmish at Greenland Gap |
| April 26 | Phillippi and Altamont (Detachment) |
| April 28 | Rowlesburg (Companies B, F, I) |
| April 29 | Fairmont (Company K) |
| June | Assigned to Mulligan’s Brigade, Scammon’s Division Dept. of West Virginia |
| July | Pursuit of Lee |
| July 6 | Hedgesville and Back Creek |
| August 16 | At Petersburg, W. Va. |
| September 4 | Petersburg Gap |
| September 11 | South Fork (Co. I) |
| November 8-9 | Moorefield |
| December | Assigned to 2nd Brigade, 2nd Division, West Virginia |
| December 8-25 | Demonstration from Kanawha Valley, W. Va. |
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1864 |
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| December 31- January 5 |
Operations In Hampshire and Hardy Counties |
| January 27 – February 7 | Operations In Hampshire and Hardy Counties |
| January 29-30 | Medley |
| February 21-22 | Scout to Moorefield (Detachment) |
| April | Regiment veteranized at New Creek and on furlough until June. Assigned to Kelly’s Command, Reserve Division, West Virginia |
| May 5 | Raid on Baltimore & Ohio Railroad between Bloomfield and Piedmont (Non-Veterans) |
| July 3 | Leetown |
| July 4-7 | Operations about Harper’s Ferry assigned to 1st Brigade, 3rd Infantry, Division West Virginia |
| July 4-6 | Bolivar Heights |
| July 6-7 | Maryland Heights |
| July 17-18 & July 20 | Snicker’s Ferry |
| July 24 | Kernstown (or Winchester) |
| July 30 | Medley |
| August 7 – November 28 |
Sheridan’s Shenandoah Valley Campaign. Assigned to 3rd Brigade, 1st Infantry Division, West Virginia |
| August 12 | Cedar Creek |
| August 17 | Winchester |
| August 22-23 | Halltown |
| September 3 | Berryville |
| September 19 | Third Battle of Winchester (Battle of Opequan) |
| September 22 | Battle of Fisher’s Hill
Private John Creed of Company D was awarded the Medal of Honor for extraordinary heroism for capturing a Confederate flag. |
| September-December | Duty In the Shenandoah Valley |
| December 30 | Moved to Petersburg front for siege operations against Petersburg and Richmond and duty in the trenches before Richmond and on the Bermuda Hundred front. Attached to 2nd Brigade, Independent Division, 24th Army Corps, Army of the James |
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1865
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| March 27-28 | Moved to Hatcher’s Run |
| March 28-April 9 | Appomattox Campaign |
| April 1 | Hatcher’s Run |
| April 2 | Assault on Fort Gregg and fall of Petersburg |
| April 3-9 | Pursuit of Lee |
| April 9 |
Appomattox Court HouseSurrender of Lee and his army. |
| April-July | Duty in the Department of Virginia |
| June | Assigned to 1st Brigade, Independent Division, 24th Army Corps |
| July 24 | Mustered out at Richmond, Va. |
| July 30 | Discharged at Chicago, Ill. |