Hi and welcome
I can't be of much help I'm afraid because I know nothing of the American armed forces and by the looks of the replies you've had no one much else does either.
There's a poly group at yahoo groups, maybe someone there could shed some light. Otherwise there are quite a few poly blogs you could wade through if you're really keen.
It's hard to believe consensual non-monogamy could be a punishable offense, but then I find a lot of things hard to believe.