The reason the loss of life in the Civil War was so high was because military tactics had not changed since the Napoleonic Wars, yet technology had greatly advanced. The Civil War generals studied Napoleon at West Point. The problem is we went from muskets to rifles that allowed accuracy for a much further distance. Napoleon had the advantage by charging the enemy, but in the Civil War a frontal charge got everyone killed.
Today is my last day of teaching classes before finals, I will pick back up with Class Notes in January.