Do we still need Marines?

Do we still need Marines? Don't mistake this question for some leftists' including left-libetarians' anti-authority (daddy issues) thus anti-military kick. Being pro-military doesn't mean you think the military is infallible or above criticism. (My brown leather jacket is regulation Navy/Marine.) It's not a religion. Some say the Marines are a religion as well as a huge self-promoter. Anyway,