D
| "Devil Fish" | Term for fish-shaped Confederate torpedo |
| "the Dictator" | Seacoast mortar used during Petersburg siege |
| "Diggings" | Term for a Soldier's camp |
| "Dog Collar" | Army issued cravat |
| "Dog Robber" | Detailed cook from regular ranks |
| "Done to a turn" | Something had been completed or accomplished satisfactorily |
| "Dragoon" | Cavalry with firearms |
| "Duds" | Clothing |
| "Durance Vile" | Prison foul |