Can you keep a secret? We sure hope so, because we're about to clue you in on some of the most closely guarded secrets in military history!
When it comes to large weapons of destruction, the Germans undoubtedly led the way in World War Two. Like those two ginormous "kanones" that had to be transported on train tracks. It would have been hard to miss them or the payload they were designed to deliver. Did we jog your memory? Good - now go find them in the quiz!
Following World War Two, during the Cold War, the Soviet Union took the development of experimental weapons to new heights. They tried out laser pistols, spacecraft and even flying tanks! Those were just the tip of the iceberg; however, we dare you to dive into the quiz and discover the rest!
No doubt, many of the most sophisticated and stealthy designs came from the Americans. If everyone thought you'd lost your mind when you said you saw that flying saucer well, here's the proof that you were right all along! Can you spot any more of the high-tech, futuristic designs we've got on display in the quiz? We'll beam you up to have a look!
If you want to ace this quiz, your military knowledge will have to be more than just a prototype. Show you're in on all the best top secret developments - start the quiz!