Confederate forces at Fort Donelson had a total estimated strength of 13,089, with 257 killed, 1,069 wounded, and 161 missing, for an aggregate of 1,492 casualties. Buckner's Division had a strength of 3,425 and an aggregate of 406 casualties, including Brown's Brigade with 326 and Hanson's Regiment with 80. Johnson's Division had a strength of 4,309 and an aggregate of 407 casualties, including Heiman's Brigade with 40, Drake's Brigade with 81, and Davidson's Brigade with 286. Pillow's Division had a strength of 2,633 and an aggregate of 585 casualties, including Baldwin's Brigade with 258, McCausland's Brigade with 110, and Wharton's Brigade with 217. Non-divisional units had a strength of 2,722 and an aggregate of 94 casualties, including Head's Brigade with 64, Forrest's Cavalry with 24, and unbrigaded artillery with 6.