WW2
The Graf Spee never sank, The scuttling attempt failed and the ship was bought by the British. On board was Germany's newest radar system.
One of Japan's methods of destroying tanks was to bury a very large artillery shell with on ly the nose exposed. When a tank came near the enough a soldier would whack the shell with a hammer. "Lack of weapons is no excuse for defeat." - Lt. Gen. Mataguchi