Hello; Absolutely unstoppable. The trailer vehicle (with tracks of it's own), does this operate on a separate engine, or is it powered by hydraulics as possibly the main vehicle towing/steering/leading? This vehicle is called a S.U.S.V. small unit support vehicle, made in sweeden, these at Ft.Greely Alaska in different types of terrain, in snow, ice, rivers lakes, ect. They are absolutely amazing they will go just about anywhere, powered by a Mercedes in-line 6 cylinder diesel motor, and 4 speed automatic transmission, there are 4 different versions that, a troop carrier, communications vehicle, flat bed, and cargo vehicle.