Siege of Charleston Harbor Union order of battle

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, James Island, Second Fort Wagner and the Siege of Charleston Harbor.

Department of the South
BG Quincy A. Gillmore

Department of the South (July-August)
BG Quincy A. Gillmore
 * Chief of Staff and Artillery: Col John Wesley Turner
 * Medical Director: Ltc Augustus C. Hamlin

Department of the South (August-September)
BG Quincy A. Gillmore
 * Chief of Staff and Artillery: Col John Wesley Turner
 * Medical Director: Ltc Augustus C. Hamlin

South Atlantic Blockading Squadron
Rear Admiral John A. Dahlgren