81st Illinois Infantry

== Regimental History and Service Record ==
Organized at Anna, Ill., and mustered in August 26, 1862. Ordered to Cairo, Ill., and thence to Humboldt, Tenn., October 8, 1862. Attached to District of Columbus, Ky., Department of the Tennessee, to November, 1862. 1st Brigade, 3rd Division, Right Wing 13th Army Corps (Old), Department of the Tennessee to December, 1862. 4th Brigade, 3rd Division, 13th Corps, to December, 1862. 3rd Brigade, 3rd Division, 17th Army Corps, Army of the Tennessee, to March, 1864. 2nd Brigade, Provisional Detachment 17th Army Corps, Department of the Gulf, to June, 1864 (Non-Veterans). 2nd Brigade, Sturgis' Expedition, June, 1864. Detached Brigade, 17th Army Corps, June, 1864 (Non-Veterans). 4th Brigade, 1st Division, 16th Army Corps, to December, 1864 (Non-Veterans). 3rd Brigade, 3rd Division, 17th Army Corps, to December, 1864 (Veterans). 2nd Brigade, 3rd Division, Detachment Army of the Tennessee, Department of the Cumberland, to February, 1865. 3rd Brigade, 3rd Division, 16th Army Corps, Military Division West Mississippi, to July, 1865.
SERVICE.---Grant's Central Mississippi Campaign November 2, 1862, to January 10, 1863. Reconnaissance from LaGrange November 8-9, 1862. Moved to Memphis, Tenn., January 12-19, thence to Lake Providence, La., February 20-23, and duty there until April 17. Moved to Milliken's Bend, La., April 17. Movement on Bruinsburg and turning Grand Gulf April 25-30. 
* May 1, 1863 - Battle of Port Gibson, Mississippi 
* Raymond May 12. 
* Jackson May 14. 
* Champion's Hill May 16. 
* Big Black River May 17. 
* May 18-July 4, 1863 - Siege of Vicksburg, Mississippi
** May 19, 1863 - Assault on Vicksburg, Mississippi
** May 22, 1863 - Assault on Vicksburg, Mississippi
** June 25, 1863 - Assault on Vicksburg, MississippiNo reference to this in Dyer, only appears on some Illinois unit pages
** July 4, 1863 - Surrender of Vicksburg, Mississippi
* Duty there until March, 1864. 
* August 20-September 2, 1863 - Expedition from Vicksburg, Mississippi to Monroe, Louisiana
* Expedition toward Canton October 14-20. 
* Bogue Chitto Creek October 17. 
* January 10-16, 1864 - Expedition from Vicksburg, Mississippi to Sunnyside Landing, Arkansas
* March 10-May 22, 1864 - The Red River Campaign (Non-Veterans) 
** March 10-May 24, 1864 - Expedition from Vicksburg, Mississippi to Red River, LouisianaNot originally referenced on unit homepage
** Fort DeRussy March 14. 
** Battle of Pleasant Hill April 9. 
** Pleasant Hill Landing April 12-13. 
** About Cloutiersville April 22-24. 
** At Alexandria April 26-May 13. 
Bryce's Plantation May 6. Wells' Plantation May 6. Bayou Boeuf May 7. Retreat to Morganza May 13-20. Manaura May 16. Yellow Bayou May 13. Moved to Vicksburg, Miss., May 21-24, thence to Memphis, Tenn., May 28-30. Sturgis' Expedition to Guntown June 1-13. Brice's (or Tishamingo) Creek, near Guntown, June 10. Ripley June 11. Moved to St. Charles, Ark., August 3-6, thence to Duvall's Bluff September 1 and to Brownsville September 8. through Arkansas and Missouri in pursuit of Price September 17-November 21. Moved to Nashville, Tenn., November 23-30. Battle of Nashville December 15-16. Pursuit of Hood to the Tennessee River December 17-28. Moved to Eastport, Miss., and duty there until February 6, 1865.
Veterans Joined 3rd Brigade, 3rd Division, 17th Army Corps, at Cairo, Ill., thence moved to Clifton, Tenn., and march to Ackworth, Ga.. via Huntsville and Decatur, Ala., and Rome, Ga., May 4-June 8, 1864. 
* June 8-September 8, 1864 - The Atlanta Campaign
** Operations about Marietta, Ga., and against Kenesaw Mountain June 10-July 2. 
** Assault on Kenesaw June 27. 
** Nickajack Creek July 2-5. 
** Howell's Ferry July 5. 
** On line of the Chattahoochie River July 6-17. 
** Leggett's Bald Hill July 20-21. 
** July 22, 1864 - Battle of Atlanta, Georgia
** July 22-August 25, 1864 - Siege of Atlanta, Georgia
** Flank movement on Jonesboro August 25-30. 
** Battle of Jonesboro August 31-September 1. 
** Battle of Lovejoy Station September 2-6. 
* Operations against Hood in North Georgia and North Alabama September 29-November 3. 
** October 26-29, 1864 - Expedition from Atlanta, Georgia to Tuckum's Crossroads, Georgia
Rejoined Regiment at Nashville, Tenn. Moved to New Orleans, La., February 6-21, 1865, and duty there until March 12. Campaign against Mobile and its defenses March 21-April 12. Siege of Spanish Fort and Fort Blakely March 26-April 8. Assault and capture of Fort Blakely April 9. Occupation of Mobile April 12. March to Montgomery April 14-25. Duty there until July. Moved to Chicago, Ill., via Meridian and Vicksburg, Miss., July 19-August 5. Mustered out August 5, 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 8 Officers and 66 Enlisted men killed and mortally wounded and 3 Officers and 292 Enlisted men by disease. Total 369.
== Legacy ==
== Notes ==
== Sources == 
* (Pages 703, 714, 715, 720, 750, 777, 779, 782, 784, 786, 1081)
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