The National Guard is a unique governmental body and a vital component of the United States Armed Forces, comprising reserve military forces of the U.S. Army and Air Force. Headquartered across all 50 U.S. states, territories, and the District of Columbia, it operates under the dual control of state governors and the federal government. Its primary mission is to serve both community and country, responding to domestic emergencies like natural disasters and civil unrest, and supporting overseas military operations. Dating back to 1636, it is the oldest American military institution, known for its significant contributions to national defence and disaster response.