A) You're thinking of the Foreign Legion. Go look it up. A few years of military service and you're in.
B) When you get married you're making a very serious promise to share everything and build a life together. The state provided default contract for a marriage is very clear about the separation terms up front. If you don't like them, then negotiate a pre-nup with your spouse.
A) The Foreign Legion has much tighter regulations now, and is no longer suitable for its traditional purpose of providing new identities for those with something to run from.
B) US courts routinely and capriciously invalidate pre-nups.
B) When you get married you're making a very serious promise to share everything and build a life together. The state provided default contract for a marriage is very clear about the separation terms up front. If you don't like them, then negotiate a pre-nup with your spouse.
Good luck.