Tank Unit 115 respond to an old emergency transmission from a UNSC Vehicle Depot on the edge of the outlands. Whilst searching the Depot they discover a prototype of some kind of tank. Even though it didn't have the cannon, it had a twin machine gun turret in the front, and another turret to the right of the vehicle. ( for this little build I took apart the call of duty Abrams tank and rebuilt it to this little modernish half track)