21st Wisconsin Infantry

== Regimental History and Service Record ==
Organized at Oshkosh, Wis., and mustered in September 5, 1862. Left State for Cincinnati, Ohio, September 11, thence to Covington, Ky., and to Louisville, Ky., September 15. Duty in the fortification of Louisville September 18-October 1. Attached to 28th Brigade, 3rd Division, Army of the Ohio, September, 1862. 28th Brigade, 3rd Division, 1st Army Corps, Army of the Ohio, to November, 1862. 3rd Brigade, 1st Division, Center 14th Army Corps, Army of the Cumberland, to January, 1863. 3rd Brigade, 1st Division, 14th Army Corps, Army of the Cumberland, to April, 1863. 2nd Brigade, 1st Division, 14th Army Corps, to April, 1864. 1st Brigade, 1st Division, 14th Army Corps, to June, 1865.
SERVICE.--Pursuit of Bragg to Crab Orchard, Ky., October 1-16, 1862. 
* October 8, 1862 - Battle of Perryville, Kentucky
Guard duty at Mitchellsville until December 7. Moved to Nashville, Tenn., and duty there until December 26. Advance on Murfreesboro December 26-30. Jefferson December 30. Battle of Stone's River December 30-31, 1862, and January 1-3, 1863. Duty at Murfreesboro until June. Expedition to McMinnville April 20-30. Middle Tennessee (or Tullahoma) Campaign June 23-July 7. Hoover's Gap June 24-26. Occupation of Middle Tennessee until August 16. 
* August 16-September 22, 1863 - The Chickamauga Campaign
** Davis Cross Roads, near Dug Gap, September 11. 
** September 19-September 20, 1863 - Battle of Chickamauga, Georgia
** Rossville Gap September 21. 
* September 24-October 27, 1863 - Siege of Chattanooga, Tennessee
* November 23-27, 1863 - The Chattanooga/Ringgold Campaign
** Orchard Knob November 23-24.
** Mission Ridge November 25.
* Reconnaissance to Cooper's Gap November 30-December 3. 
* May 1-September 8, 1864 - The Atlanta Campaign
** May 8-11, 1864 - Demonstration against Rocky Faced Ridge, Georgia
** May 13, 1864 - Combat at Resaca, Georgia
** May 14-May 15, 1864 - Battle of Resaca, Georgia
** Advance on Dallas May 18-25. 
** May 25-June 5, 1864 - Operations in Bartow County, Georgia
** Pickett's Mills May 27. 
** Operations about Marietta and against Kenesaw Mountain June 10-July 2. 
** Pine Hill June 11-14. 
** Lost Mountain June 15-17. 
** Assault on Kenesaw June 27. 
** Ruff's Station July 4. 
** Chattahoochie River July 5-17. 
** Buckhead, Nancy's Creek, July 18. 
** Peach Tree Creek July 19-20. 
** July 22-August 25, 1864 - Siege of Atlanta, Georgia
** Utoy Creek August 5-7. 
** Flank movement on Jonesboro August 25-30. 
** Near Red Oak August 29. 
** Battle of Jonesboro August 31-September 1. 
* Operations against Hood in North Georgia and North Alabama September 30-November 3.
** October 19, 1864 - Veterans and Recruits from the (II) 1st Wisconsin Infantry transferred to companies of this regiment
* November 15-December 21, 1864 - The Savannah Campaign
** December 10-21, 1864 - Siege of Savannah, Georgia
* January 1-April 26, 1865 - The Carolinas Campaign
** Taylor's Hole Creek, Averysboro, N. C., March 16. 
** Battle of Bentonville March 19-21. 
** Occupation of Goldsboro March 24. 
** Advance on Raleigh April 10-14. 
** Occupation of Raleigh April 14. 
** Bennett's House April 26. 
*** Surrender of Johnston and his army. 
* March to Washington, D.C., via Richmond, Va., April 29-May 17. 
* Grand Review May 24. 
* Mustered out June 8 and discharged from service June 17, 1865.
== Regimental Roster ==
 
 
 Field and Staff Officers
 
 
 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 ==
Source 	Casualties	Remarks
Dyer 	
* 5 Officers and 117 enlisted men killed and mortally wounded 
* 3 Officers and 180 enlisted men killed by disease
* Total 305	None
Fox 	
* Fox lists this unit as:
** 177th on the list of units with losses based on duration of the entire term of service of the unit (9th of the Wisconsin troops)	None
WotRWiki Statistics	
* troops killed
** Includes troops mortally wounded
** Includes troops killed by disease
** All others are troops killed in action or under special circumstances	
== Legacy ==
== Notes ==
== Sources == 
* (Pages 164-200)
* (Pages 701, 704, 705, 707, 715, 721, 723, 733, 835, 860, 862, 866, 1682)
* (Page 14)
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