Fort Donnelson, Battle of

Fort Donnelson, Battle of (Tenn.) On 6 February 1862, Brigadier General Ulysses S. Grant’s 15,000 Federals (supported by four navy gunboats) took Brigadier General Lloyd Tilghman’s garrison, most of which had gone to Fort Henry to avoid capture. USA losses: none. CSA losses: 5 killed, 11 wounded, 63 captured. The victory opened the Tennessee River to US naval operations and forced the retreat of General Albert Johnston’s 26,000 Confederate troops from Ky.