the supply convoy to china during the great war slip out off radar and gets unharmed but their destination is not safe or no longer exist, to hie radioactivity in area or something. and they lose contact whit home base and their superior′s .
the convoy decide to find a safe spot and build a home there insted whit the supply they have in ship′s. and they have also supply and gears to build vaults, that was meant to use by the us troops stationed in china