The Colonial Militia was a military force composed of local citizens in the American colonies during the 17th and 18th centuries. These militias were formed to provide defense against threats, such as Native American attacks or foreign invasions. Members were typically volunteers who trained periodically and were expected to respond quickly in times of crisis. Militia units played a crucial role in the early conflicts leading up to the American Revolution. They were often called upon to support regular army forces, such as the Continental Army, and participated in significant battles, helping to shape the future of the United States.