Hitler's Superweapon: Nazi Germany Built the Largest 'Gun' Ever
War trains dominated combat for more than 100 years. Massive rail-borne artillery shelled the enemy while trains unloaded troops and supplies. For a brief moment, the terrifying machines were the most powerful weapon on the battlefield. But technology advanced.
Improvements to tanks, cars and planes during World War II marked the twilight of the war train. The great trains of the First World War still dominated the imagination, however, and the Nazis built impressive — but impractical — railborne cannons.