Militias are groups of armed citizens who organize themselves to provide defense and security, often in response to perceived threats. Unlike official military forces, militias are usually made up of volunteers and can operate independently or alongside government forces. They may form for various reasons, including community protection, political beliefs, or in response to emergencies. In some countries, such as the United States, militias have a long history, dating back to the colonial era when local men banded together to defend their communities. While some militias focus on positive community roles, others may engage in controversial or extremist activities, leading to debates about their impact on society and law enforcement.