The United Field Theory opened the path for countless applications, including the revolutionary gravimagnetic drive. The new engine type allowed for much more flexibility with military designs, introducing air transports bigger than any time before. Such large gravimagnetic transports, collectively known as Hoppers, quickly became popular in most militaries because of how cheap it was to lift and move cargo. The biggest military Hoppers were easily over 200 meters long and half as wide, able to transport dozens of tanks or War Walkers at a time and often equipped with significant firepower to protect their load.