21st Iowa Infantry

== Regimental History and Service Record ==
Organized at Dubuque August, 1862. Moved to St. Louis, Mo., September 16. Attached to District of Rolla, Dept. of Missouri, to October, 1862. Warren's Brigade, District of Southeast Missouri, Dept. of Missouri, to January, 1863. 2nd Brigade, 2nd Division, Army of Southeast Missouri, Dept. of Missouri, to March, 1863. 2nd Brigade, 14th Division, 13th Army Corps, Dept. of Tennessee, to July, 1863. 2nd Brigade, 1st Division, 13th Army Corps, Dept. of Tennessee, to August, 1863, and Dept. of the Gulf to March, 1864. 1st Brigade, 1st Division, 13th Army Corps, Dept. of the Gulf, to June, 1864. District of LaFourche, Dept. of the Gulf, to August, 1864. 2nd Brigade, 2nd Division, 19th Army Corps, Dept. of the Gulf, to December, 1864. 1st Brigade, Reserve Corps, Military Division West Mississippi, to February, 1865. 1st Brigade, 1st Division, Reserve Corps, Military Division West Mississippi, to February, 1865. 1st Brigade, 1st Division, 13th Army Corps, Military Division West Mississippi, to July, 1866.
SERVICE.--Moved from St. Louis to Rolla, Mo., September 22, 1862, and duty there until October 18. Moved to Salem October 18-20, and duty there until November. Moved to Houston and Hartsville. Action at Beaver Creek, Texas County, Mo., November 24 (Detachment). Moved to Houston December, and duty there until January 27, 1863. March to relief of Springfield, Mo., January 9-17. Action at Hartsville, Wood's Fork, January 11. Moved to West Plains January 27-February 2, thence to Iron Mountain February 9-25, and to St. Genevieve March 9-11. Moved to Milliken's Bend, La., March 15-22, and duty there until April 25. Movement on Bruinsburg and turning Grand Gulf April 25-30. 
* May 1, 1863 - Battle of Port Gibson, Mississippi 
* Bayou Pierrie May 2-3. 
* Battle of 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
Advance on Jackson, Miss., July 5-10. Siege of Jackson July 10-17. Ordered to Dept. of the Gulf August 13. Duty at Carrollton, Brashear City and Berwick until October 3. 
* October 3-November 30, 1863 - The (II) Bayou Teche Campaign 
Expedition to New Iberia October 3-6 and to Vermillion Bayou October 8-30. Moved to Brazos, Santiago, Texas, November 22-26. At Matagorda Island and Indianola until March, 1864, and at Matagorda Island until June. Moved to New Orleans, La., and provost duty at Algiers, Carrollton and Thibodeaux until July 26. Moved to Morganza July 26, and duty there until September 3. Moved to mouth of White River, Ark., September 3. Duty there and at St. Charles and Duvall's Bluff until December. At Memphis, Tenn., until January, 1865. Ordered to New Orleans, La., January 1, thence to Kennersville Station, and duty there until February 5. Moved to Dauphin Island. Ala., February 5. Campaign against Mobile and its defenses March 17 to April 12. Siege of Spanish Fort and Fort Blakely March 26-April 8. Assault on and capture of Fort Blakely April 9. Occupation of Mobile April 12 to May 26. Moved to Shreveport, La., May 26--June 8, and duty there and in District of LaFourche until July. Mustered out July 25, 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 4 Officers and 77 Enlisted men killed and mortally wounded and 1 Officer and 168 Enlisted men by disease. Total 250.
== Legacy ==
== Notes ==
== Sources == 
* (Pages 749, 777, 779, 1173-1174)
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