The Civil War Officer is a Civil War-era combatant found on the battlefield. They are not very common, but neither are they rare. The only weapons they use are the Colt Revolver and the Sword. They are the only ammo source for the Colt Revolver. Some Cavalry also use this weapon, but you cannot pick up the their revolvers.
Officers have more health than a regular soldier, able to take up to two hits from a Springfield Musket. Their Colt Revolver gives them a dangerous rapid-fire (in Civil War terms) ability, therefore they can make for dangerous opponents if encountered in numbers; this is however rare, as most officers generally spawn alongside a troupe of regular infantry.