The Civil War Battle of Allatoona Pass on October 5, 1864 Allatoona was a relatively small, but bloody battle with a high percentage of casualties: 706 Union (including about 200 prisoners) and 897 Confederate. A Confederate division under Maj. Gen. Samuel G. French attacked a Union garrison under Brig. Gen. John M. Corse, but was unable to dislodge it from its fortified position protecting the railroad through Allatoona Pass.