The colonial militia system in the America coloniescomprised civilian men legally obligated to arm themselves and participate in military training to defend their communities. It was a decentralized system, with each colony establishing its enrollment, equipment, and serviceregulations. Unlike professional armies, the militia consisted of ordinary citizens expected to provide their weapons and serve part-time. The militia played a vital role in the defense and expansion of the colonies. It provided a readily available force to respond to Indian raids, suppress internal rebellions, and participate in larger conflicts such as the French and Indian War. The militia system also fostered a sense of civic duty and self-reliance among colonists. The colonial militia formed the backbone of the American forces during the Revolutionary War.