21st Missouri Volunteer Infantry

The 21st Missouri Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.

Service
Organized February 1, 1862, from 1st and 2nd Northeast Regiments Missouri Infantry. Attached to Dept. of Missouri to March, 1862. 1st Brigade, 6th Division, Army of the Tennessee, to July, 1862, 1st Brigade, 6th Division, District of Corinth, Miss., to November, 1862. 1st Brigade, 6th Division, Left Wing 13th Army Corps (Old), Dept. of the Tennessee, to December, 1862. District of Columbus, Ky., 16th Army Corps, Dept. of the Tennessee, to May, 1863. 4th Brigade, District of Memphis, Tenn., 5th Division, 16th Army Corps, to January, 1864. 1st Brigade, 3rd Division, 16th Army Corps, to December, 1864. 1st Brigade, 2nd Division, Detachment Army of the Tennessee, Dept. of the Cumberland, to February, 1865. 1st Brigade, 2nd Division, 16th Army Corps (New), Military Division West Mississippi, to August, 1865. Dept. of Alabama to April, 1866.

Detailed service
Ordered to Pittsburg Landing, Tenn., March, 1862. Battle of Shiloh, Tenn., April 6-7. Advance on and siege of Corinth, Miss., April 29-May 30. Occupation of Corinth and pursuit to Booneville May 31-June 12. Duty at Corinth until September. Battle of Iuka September 19. Battle of Corinth October 3-4. Pursuit to Ripley October 5-12. Grant's Central Mississippi Campaign November, 1862, to January, 1863. On post and garrison duty at Columbus, Ky.; Union City, Tenn.; Clinton, Ky., and Memphis, Tenn., until January, 1864. Ordered to Vicksburg, Miss., January 26. Actions with guerrillas at Islands Nos. 70 and 71, Mississippi River, while en route, January 29, on steamer "William Wallace," Meridian Campaign February 3-March 2. Queen Hill February 4. Red River Campaign March 10-May 22. Fort DeRussy March 14. Occupation of Alexandria, La., March 16. Battle of Pleasant Hill April 9. About Cloutiersville April 22-24. At Alexandria April 26-May 13. Retreat to Morganza May 13-20. Mansura May 16. Yellow Bayou May 18. Moved to Vicksburg, Miss.. thence to Memphis, Tenn., May 22-June 10. Action at Old River Lake or Lake Chicot June 5-6. Smith's Expedition to Tupelo, Miss., July 5-21. Camargo's Cross Roads, near Harrisburg, July 13. Tupelo July 14-15. Old Town Creek July 15. Smith's Expedition to Oxford, Miss., August 1-30. Tallahatchie River August 7-9. Abbeville August 23. Moved to Duvall's Bluff, Ark., September 1-6. March through Arkansas and Missouri in pursuit of Price September 17-November 16. Lone Jack November 1. Moved to Nashville, Tenn., November 25 December 1. Battle of Nashville December 15-16. Pursuit of Hood to the Tennessee River December 17-28. Moved to Clifton, Tenn., thence to Eastport, Miss., January 2-7, 1865, and duty there until February 9. Moved to Vicksburg, Miss., thence to New Orleans, La., February 9-21. Campaign against Mobile and its Defenses March 17-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 13-25, and duty there until June. Moved to Mobile June 1. Duty at Mobile and other points in Alabama until April, 1866. Mustered out April 19, 1866.

Casualties
Regiment lost during service 2 Officers and 68 Enlisted men killed and mortally wounded and 5 Officers and 234 Enlisted men by disease. Total 309.

Commanders

 * Colonel David Moore: Commander from muster of unit until Feb 11, 1865.