Marine Corps League members may join the RMA/USA per the RMA HQ. I joined about two years ago and am now the National Vice President. The Association is based in Fairfax Station, VA and one can contact the Secretary for detailed information;

John Topping
Secretary, RMA/USA
8409 Lake Crest Terrace
Fairfax Station, VA 22039-2678

Mention my name Brian Hipwell