as part of its motorization from the years leading up to WWII, the German military took regarding SS-100 - huge tractor based on a commercially-developed agricultural car. It was a workhose with a towing ability of 20 tons, thanks to its highly reliable 6-cylinder water-cooled engine. Implemented by the German Army, Luftwaffe and Navy, the SS-100 towed all manner of topics: field weapons, aircraft, fuel and water tanks, V2 rockets, and even disabled vehicles, its versatility and dependability standing it in good stead.