123rd Illinois Infantry

== Regimental History and Service Record ==
Organized at Mattoon, Ill., and mustered in September 6, 1862. Left State for Louisville, Ky., September 19, 1862. Attached to 33rd Brigade, 10th Division, Army of the Ohio, to October, 1862. 33rd Brigade, 10th Division., 1st Corps, Army of the Ohio, to November, 1862. 1st Brigade, 5th Division, Centre 14th Army Corps, Army of the Cumberland, to January, 1863. 1st Brigade, 5th Division, 14th Army Corps, to June, 1863. 1st Brigade, 4th Division, 14th Army Corps, to October, 1863. 3rd Brigade, 2nd Division, Cavalry Corps, Army of the Cumberland, to November, 1864, and Military Division Mississippi, to June, 1865.
SERVICE. Duty at Louisville, Ky., until October 1, 1862. Pursuit of Bragg into Kentucky October 1-12. 
* October 8, 1862 - Battle of Perryville, Kentucky 
March to Munfordsville October 12-18, and duty there until November 30. Expedition to Cave City October 31-November 26. Moved to Bledsoe Creek November 30. Pursuit of Morgan to Bear Wallow December 26, 1862, to January 2, 1863. March to Nashville, thence to Murfreesboro, Tenn., January 3-10, 1863. Duty at Murfreesboro until June. Action at Woodbury January 24. 
* February 3-5, 1863 - Expedition from Murfreesboro, Tennessee
Cainsville February 15. Expedition to Woodbury March 3-8. Breed's Hill March 4. Vaught's Hill, near Milton, March 20. Expedition to Lebanon, Carthage and Liberty April 1-8. Expedition to McMinnville April 20-30. Regiment mounted and armed with Spencer carbines :May 6. Attached to Wilder s Mounted Brigade, Smithville, June 5. Middle Tennessee (or Tullahoma) Campaign June 24-July 7. Big Spring Branch June 24. Hoover's Gap ;rune 24-26. Occupation of Manchester June 27. Esuntil Springs July 2. Occupation of Middle Tennessee until August 16. Expedition to Columbia and Centreville July. Expedition from Decherd, Tenn., August 5-9. 
* August 16-September 22, 1863 - The Chickamauga Campaign
** Ringgold, Ga., September 11. 
** Lee and Gordon's Mills September 11-13. 
** Leet's Tan Yard (or Rock Springs) September 12-13. 
** September 18, 1863 - Skirmish at Alexander's Bridge, Georgia
** Reed's Bridges September 18. 
** Pea Vine Creek September 18. 
** Crawfish Springs and Dyer's Ford September 18. 
** September 19-September 20, 1863 - Battle of Chickamauga, Georgia
Operations against Wheeler and Roddy September 30-October 17. Hill's Gap, Thompson's Cove, near Beersheeba, October 3. Murfreesboro Road October 4. Near McMinnville October 4-5. Farmington October 7. Sim's Farm, near Shelbyville. October 7. Camp at Maysville, Ala., October 19-December 21. Moved to Pulaski December 21, thence to Mooresville, Ala., January 12, 1864, and guard Tennessee River until April. Moved to Columbia, Tenn., thence to Join army near Dalton, Ga., reporting May 11. 
* May 1-September 8, 1864 - The Atlanta Campaign
** May 14-May 15, 1864 - Battle of Resaca, Georgia
** Near Dallas May 24. 
** May 25-June 5, 1864 - Operations in Bartow County, Georgia
** Near Big Shanty June 9. 
** Operations about Marietta and against Kenesaw Mountain June 10-July 2. 
** Noonday Creek June 19. 
** Powder Springs, Lattimer's Mills, Noonday Creek, June 20. 
** Noonday Creek and assault on Kenesaw June 27. 
** Nickajack Creek July 2-5. 
** Rottenwood Creek July 4. 
** Chattahoochie River June 5-17. 
** Stone Mountain Station July 19. 
** Garrard's Raid to Oxford and Covington July 22-24. 
** Garrard's Raid to South River July 27-31. 
** Snapfinger Creek July 27. 
** Flat Rock Bridge July 28. 
** August 1-13, 1864 - Siege of Atlanta, Georgia
** Operations about Chattahoochie River Bridge, Pace's and Turner's Ferries August 26-September 2. 
** Occupation of Atlanta September 2. 
* Operations against Hood in North Georgia and North Alabama September 29-November 3. 
Near Lost Mountain October 4-7. New Hope Church October 7. Dallas October 7. Rome October 10-11. Narrows October 11. Coosaville Road, near Rome, October 13. Near Summerville October 18. Little River October 20. Leesburg, Blue Pond, October 21. Ladiga, Terrapin Creek, October 28. Dismounted November 1, and ordered to Louisville, Ky. Refitting at Louisville until December 28. Moved to Gravelly Springs, Ala., December 28, 1864-January 20, 1865. Wilson's Raid on Selma, Ala., and Macon, Ga., March 22-April 24. Selma April 2. Montgomery April 12. Columbus, Ga., April 16. Macon, Ga., April 20. Moved to Chattanooga, Tenn., May 23; thence to Nashville and duty there until June 27. Mustered out June 27 and discharged at Springfield, Ill., July 11, 1865.
== Regimental Roster ==
 
 
 Field and Staff Officers
 
 
 Regimental Band
 
 
 Company A
 
 
 Company B
 
 
 Company C
 
 
 Company D
 
 
 Company E
 
 
 Company F
 
 
 Company G
 
 
 Company H
 
 
 Company I
 
 
 Company K
 
 
 Unassigned
 
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== Regiment Statistical Information ==
* Regiment lost during service 3 Officers and 82 Enlisted men killed and mortally wounded and 1 Officer and 133 Enlisted men by disease. Total 219.
== Legacy ==
== Notes ==
== Sources == 
* (Pages 701, 703, 705, 707, 733, 854, 860, 1098)
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