State militias have helped to defend the United States since the Revolutionary War. Today, 23 states and territories have organized militias, most commonly known as State Defense Forces (SDFs). SDFs provide governors with a cost-effective, vital force multiplier and resource, especially if state National Guard units are deployed out of state. However, in general, SDFs are underfunded and undersupported. Some states at high risk for a natural or man-made disaster have not even created SDFs. The U.S. and its states can no longer afford to sideline these national security assets.