21st Kentucky Infantry (U)

== Regimental History and Service Record ==
Organized at Camps Hobson and Ward, Ky., and mustered in December 31, 1861, and January 2, 1862, at Green River Bridge, Ky. Attached to 11th Brigade, 1st Division, Army of the Ohio, to March, 1862. 11th Brigade, 5th Division, Army of the Ohio, to June, 1862. 7th Independent Brigade, Army of the Ohio, to July, 1862. 23rd Independent Brigade, Army of the Ohio, to August, 1862. 23rd Brigade, 5th Division, Army of the Ohio, to September, 1862. 23rd Brigade, 5th Division, 2nd Army Corps, Army of the Ohio, to November, 1862. 3rd Brigade, 3rd Division, Left Wing 14th Army Corps, Army of the Cumberland, to January, 1863. 3rd Brigade, 3rd Division, 21st Army Corps, Army of the Cumberland, to October, 1863. Unattached, Army of the Cumberland, to January, 1864. 2nd Brigade, 1st Division, 4th Army Corps, to June, 1865. 1st Brigade, 1st Division, 4th Army Corps, to August, 1865. Dept. of Texas to December, 1865.
SERVICE.--Duty at Green River Bridge, Ky., until March, 1862. Moved to Creelsboro; thence to Nashville, Tenn., and duty there until April 1. Moved to Columbia, Tenn., April 1-2; thence march to Shelbyville April 24, and duty there until June 11. Dumont's Expedition to Cumberland Mountain June 11-14. Expedition to Wartrace June 17-19. Moved to Tullahoma July 2, thence to Duck Bridge July 4. March to Louisville, Ky., in pursuit of Bragg August 20-September 19. Pursuit of Bragg into Kentucky October 1-22, Battle of Perryville October 8 (Reserve). Nelson's Cross Roads October 18. Pittman's Cross Roads October 19. Reconnaissance on Madison Road October 20. March to Nashville, Tenn., October 22-November 12, and duty there until December 26. Dobbins' Ferry, near Lavergne, December 9. Advance on Murfreesboro December 26-30. Battle of Stone River December 30-31, 1862, and January 1-3, 1863. At Murfreesboro until June. Middle Tennessee (or Tullahoma) Campaign June 23-July 7. Liberty Gap June 25-26. Occupation of Middle Tennessee until August 16. 
* August 16-September 22, 1863 - The Chickamauga Campaign
** Ringgold, Ga., September 11. 
** Catlett's Gap September 15. 
** At Whitesides during battle of Chickamauga September 19-20. 
* September 24-October 1, 1863 - Siege of Chattanooga, TennesseeNot listed on unit homepage but referenced on Dyer summary
* At Chattanooga, Tenn., until October 1.
* October 1, 1863 - Skirmish near Smith's Crossroads, Tennessee
* October 2, 1863 - Action near Anderson's Crossroads, Tennessee
* Duty in Sequatchie Valley until November 19.
* November 23-27, 1863 - The Chattanooga/Ringgold Campaign
** Tunnel Hill, Mission Ridge, November 24-25.
** Pursuit to Graysville November 26-27.
** Chickamauga Station November 26.
* March to relief of Knoxville November 28-December 18.
* At Chattanooga and Shellmound, Tenn., until January, 1864.
* Regiment veteranize January 11, 1864, and Veterans on furlough until March 30.
* Moved to Cleveland, thence to Blue Springs, Tenn., April 26. 
* May 1-September 8, 1864 - The Atlanta Campaign
** Tunnel Hill May 6-7. 
** May 8-11, 1864 - Demonstration against Rocky Faced Ridge, Georgia
** May 9-13, 1864 - Demonstration on Dalton, Georgia
** Buzzard's Roost Gap May 8-9. 
** May 14-May 15, 1864 - Battle of Resaca, Georgia
** Near Kingston May 18-19. 
** Near Cassville May 19. 
** Advance on Dallas May 22-25. 
** May 25-June 5, 1864 - Operations in Bartow County, Georgia
** Burnt Hickory May 25. 
** 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, Smyrna Camp Ground, July 4. 
** Chattahoochie River July 5-17. 
** Peach Tree Creek July 19-20. 
** July 22-August 25, 1864 - Siege of Atlanta, Georgia
** Flank movement on Jonesboro August 25-30. 
** Battle of Jonesboro August 31-September 1. 
** Lovejoy Station September 2-6. 
* Jonesboro September 5 and 12. 
* Operations in North Georgia and North Alabama against Hood October 1-26. 
Moved to Nashville, Tenn.; thence to Pulaski, Tenn. Nashville Campaign November-December. Columbia, Duck River, November 24-27. Spring Hill November 29. Battle of Franklin November 30. Battle of Nashville December 15-16. Pursuit of Hood to the Tennessee River December 17-28. Moved to Huntsville, Ala., and duty there until March, 1865. Expedition to Bull's Gap and operations in East Tennessee March 15-April 22. At Nashville, Tenn., until June. Ordered to New Orleans, La., June 19; thence moved to Texas. Duty at Indianola and Victoria until December, Mustered out December 9, 1865.
== Regimental Roster ==
== Regiment Statistical Information ==
* Regiment lost during service 3 Officers and 57 Enlisted men killed and mortally wounded and 6 Officers and 152 Enlisted men by disease. Total 218.
== Legacy ==
== Notes ==
== Sources == 
* (Pages 703, 704, 705, 707, 715, 860, 862, 863, 866, 1206-1207)
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