According to my local USMC recruiter they do accept some Tier II (GED) applicants, granted a very few, but some.Phoenix: You might be able to join the Army with a GED, I'm not sure. I do know that the Marines, Air Force and Navy will not accept a GED or a diploma from a charter school without college credit as well. The Marines require 2 semesters or 15 hours of college credit with a charter school diploma, I'm not sure if the same rule applies to a GED. The best thing to do is ask a recruiter. If you don't get the response you want then ask another recruiter. Be persistent. Good luck.