Skirmisher
During the American Civil War, infantry manuals paid a good deal of attention to skirmishing. The tactics were based on Napoleon's heavy dependence on skirmishing during the Napoleonic Wars. Paintings and images of Civil War battles show two lines of soldiers, standing shoulder to shoulder and firing at the enemy lines at short distances. However, massed formations were not frequently used during the Civil War. Skirmishes and skirmish lines were a more common tactic.