Fort Donelson Location: Stewart County Campaign: Federal Penetration up the Cumberland and Tennessee Rivers (1862) Date(s): February 11-16, 1862 Principal Commanders: Brig. Gen. Ulysses S. Grant and Flag-Officer A.H. Foote [US]; Brig. Gen. John B. Floyd, Brig. Gen. Gideon Pillow, and Brig. Gen. Simon B. Buckner [CS] Forces Engaged: Army in the Field [US]; Fort Donelson Garrison [CS] Estimated Casualties: 17,398 total (US 2,331; CS 15,067) Description: After capturing For