Anyone tried starship boarding?

With FMA of course. Also, if I didn't miss anything the final take on FMA was
a small selection of skills, so your average marine would
have zero-g combat where your average soldier would have something
more appropriate to planetary environments.

Combat in narrow metal corridors, sounds rather nasty to me.

Hmmm, a marine in a space suit, gives all new meaning to the term "Jar Head".