Do you want to lease and take it overseas? It is rare that the lender will let you take the vehicle out of conus, it is tough to do even when you have financed the vehicle for purchase. Call USAA or one of the credit unions that deals with the military (such as Navy Federal -- www.navyfcu.org) and talk to them.
If you are talking about leasing once over there, not sure. Most of the folks I know buy hand me down cars from others that are leaving the location and just drive them until the wheels fall off.