Skirmisher
The terrain in many cases did not allow mass formations of armies but allowed skirmishers to fight in open order. The increased accuracy of rifles and rifled muskets at longer ranges made battles fought at close range unnecessary. Battles fought before at  could now be fought at . Pre-war training had also changed skirmisher tactics. Instead of one company out of ten, entire regiments were now taught how to fight as skirmishers. They fought in small formations, called “comrades in battle”. That called for four men to move and fight supporting one another.