99th Illinois Infantry

== Regimental History and Service Record ==
Organized at Florence, Ill., and mustered in August 23, 1862. Moved to St. Louis, Mo., August 23-24, 1862. At Benton Barracks, Mo., until September 8. Moved to Rolla September 8. Attached to District of Rolla, Dept. of the Missouri, to November, 1862. 1st Brigade, 1st Division, District of Southeast. Missouri, Dept. of Missouri, to February, 1863. 1st Brigade, 14th Division, 13th Army Corps, Dept. of the Tennessee, to August, 1863. 1st Brigade, 1st Division, 13th Army Corps, Dept. of the Gulf, to June, 1864. District of LaFourche, Dept. Gulf, to August, 1864. 2nd Brigade, 2nd Division, 19th Army Corps, Dept. 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, February, 1865. 1st Brigade, 1st Division, 13th Army Corps (New), Military Division West Mississippi, to July, 1865.
SERVICE.--Moved from Rolla to Salem, Mo., September 17, 1862, and duty there until November 20. Moved to Houston, Mo., November 20, and duty there until January 27, 1863. Action at Beaver Creek, Texas County, November 24. 1862. Hartsville, Wood's Forks, January 11, 1863. Moved to West Plains, Mo., January 27, and duty there until March 3. Moved to Milliken's Bend, La., March 3-15, and duty there until April 11. To New Carthage April 11-12 and duty there until April 25. Movement on Bruinsburg and turning Grand Gulf April 25-30. 
* May 1, 1863 - Battle of Port Gibson, Mississippi 
* Champion's Hill May 16; 
* Big Black River Bridge 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
** July 4, 1863 - Surrender of Vicksburg, Mississippi
Advance to Jackson. Miss., July 5-10. Siege of Jackson July 10-17. Duty at Vicksburg until August 20. Ordered to New Orleans, La., August 20. Duty at Carrollton, Brashear City and Berwick until October. 
* October 3-November 30, 1863 - The (II) Bayou Teche CampaignOn unit homepage, this unit is listed as participating unitl November 9
Moved to New Orleans November 9-12, thence to Mustang Island, Texas, November 16-25. Duty at Indianola until June, 1864. Moved to Algiers, La., June 16. Duty at Kennersville, Algiers, and Morganza until September. Moved to St. Charles, Ark., September 3-11, and duty there until October 23. Expedition to Duvall's Bluff October 23-November 12. Moved to Little Rock, thence to Memphis, Tenn., November 12-25. At Germantown, Tenn., guarding railroad until December 28. Moved to Memphis, Tenn., December 28, thence to New Orleans, La., January 1-9, 1865. Campaign against Mobile, Ala., and its defenses February 1-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. Moved to New Orleans, thence to Shreveport, La., May 28-June 6. To Baton Rouge July 19, Mustered out July 31 and discharged at Springfield, Ill., August 9, 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 47 Enlisted men killed and mortally wounded and 1 Officer and 120 Enlisted men by disease. Total 172. 
== Legacy ==
== Notes ==
== Sources == 
* (Pages 749, 777, 779, 1089)
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