Battle of Paoli
It was represented to the men that firing discovered us to the Enemy, hid them from us, killed our friends and produced a confusion favorable to the escape of the Rebels and perhaps productive of disgrace to ourselves. On the other hand, by not firing we knew the foe to be wherever fire appeared and a charge (of bayonets) ensured his destruction; that amongst the Enemy those in the rear would direct their fire against whoever fired in front, and they would destroy each other.