It is the law that all males must register with the Selective Service. Also, males must register in order to be eligible for financial aid.
https://www.sss.gov/Home/Registration
National Guard Flyer
Air Force ROTC Briefing
Air Force ROTC Info
Air Force
487-8000
www.airforce.com
Air National Guard
1-800-247-2902 or 236-3085
https://www.ang.af.mil/
Army
484-0951
www.army.mil
Army National Guard
664-2037
www.nationalguard.com
Navy
814-723-3648
www.navy.com
Marines
860-7715
www.usmc.mil