Each branch of the U.S. Armed Forces is responsible for its own recruiting. You can learn more about each branch's recruiting policies, and contact a recruiter directly, at the following websites:
National Guard: https://www.nationalguard.com/
Air Force and Space Force: https://www.airforce.com/how-to-join
Coast Guard: https://www.uscg.mil/Join/
The Department of Defense provides the military forces needed to deter war and ensure our nation's security.