Dogs vs Tanks

During World War 2, the Soviet Union trained dogs to blow up German tanks. This was achieved by starving the dogs and then placing food under tanks, thus conditioning them that food would be found under the tanks. During the battle, Russians strapped explosives on them and set them free. Since the Russians used their own tanks to train the dogs, they often ran under Russian tanks and blew them up and killed Russian soldiers instead. Their usage was soon discontinued.