The following Union Army units and commanders fought in the Siege of Charleston Harbor of the American Civil War. The Confederate order of battle is listed separately.
The following lists contain the commanders and units involved in the operations against Charleston Harbor from July to September 1863 which included the major engagements of First Fort Wagner, Grimball's Landing, Second Fort Wagner and the Siege of Charleston Harbor.
First Division
BG Alfred H. Terry
(Engaged at James Island)
Col James Montgomery
2nd Division
BG Truman Seymour
(Engaged at First Fort Wagner)
Attacking Column
BG Truman Seymour (w)
BG George C. Strong (mw)
Col Haldimand S. Putnam (k)
BG Thomas G. Stevenson