In the Second World War, during the Blitzkrieg campaign, German tanks were too fast and too powerful for Russian military. Russians idea was to train the dogs to carry bombs under the German tanks. The trainers would first starve the dogs, and then train them to find a food under the tank. Unfortunately, problem was that dogs trained under the Soviet tanks not the loud German diesel tanks. Plan backfired on Soviets, but they did manage to disable a reported 300 German tanks.