The following Union Army units and commanders fought in the Siege of Vicksburg of the American Civil War. The Confederate order of battle is listed separately. Order of battle compiled from the army organization during the campaign.
MG = Major General
BG = Brigadier General
Col = Colonel
Ltc = Lieutenant Colonel
Maj = Major
Cpt = Captain
Lt = Lieutenant
Sgt = Sergeant
w = wounded
mw = mortally wounded
k = killed
MG Ulysses S. Grant, Commanding
General Staff:
Acting Inspector General: BG Jeremiah C. Sullivan
Chief of Transportation: Col Joseph D. Webster
Chief of Staff: Ltc John A. Rawlins
General Headquarters:
Escort: 4th Illinois Cavalry, Company A: Cpt Embury D. Osband
Engineers: 1st Battalion, Engineer Regiment of the West: Maj William Tweeddale
Mississippi Marine Brigade: BG Alfred W. ElletMississippi Ram Fleet: Col Charles Rivers Ellet
1st Battalion Infantry: Ltc George E. Currie
1st Battalion Cavalry: Major James M. Hubbard
Artillery Battery: Cpt Daniel Walling
MG John Parke
MG John A. McClernand
MG Edward Ord
Escort
3rd Illinois Cavalry, Company L: Cpt David R. Sparks
Pioneers
Kentucky Engineers (Independent Company): Cpt William F. Patterson
MG William T. Sherman
Chief of Staff: Ltc John Henry Hammond
Chief of Artillery: Maj Ezra Taylor
MG Cadwallader C. Washburn
MG James B. McPherson
Escort
4th Company Ohio Cavalry: Cpt John S. Foster
BG Elias S. Dennis