The mission of the Marine Corps League is to promote the interest and preserve traditions of the United States Marine Corps; strengthen the fraternity of Marines and their families; serve Marines, FMF Navy Personnel who wear or have worn the Eagle, Globe, and Anchor; and foster the ideals of Americanism and patriotic volunteerism. The Detachment meets at 6:30 pm the third Tuesday of every month at the American Legion Post 40 Function Hall, 199 Federal Furnace Road in Plymouth.