army unit - a military unit that is part of an army

armed forces, armed services, military, military machine, war machine - the military forces of a nation; "their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker"

musketeer - a foot soldier armed with a musket

proficiency, technique - skillfulness in the command of fundamentals deriving from practice and familiarity; "practice greatly improves proficiency"