A militia is a group of ordinary citizens who are trained to fight and defend their community or country, often in times of emergency. Unlike a regular army, which is made up of full-time soldiers, a militia typically consists of volunteers who may have other jobs but are ready to take up arms when needed. They can play a crucial role in local defense and disaster response. Historically, militias have been important in various conflicts, such as the American Revolutionary War, where local militias helped fight against British forces. Today, some militias still exist, often focusing on community safety or preparedness, while others may be involved in political movements or self-defense initiatives.