As technology has evolved, so too has humanity's variety of increasingly creative ways of killing each other off increased. Particularly in the last hundred years or so, military groups have striven to create inventions that outdo other emerging technologies from across the globe, with mixed success. Occasionally, this innovation can lead to some incredible inventions that are now a staple of the world's militaries, such as tanks and jet aircraft. In fact, many declassified military technologies are now widely used by the public. For example, kitchen microwaves accidentally emerged after a U.S. Scientist realised military radars during World War II released a significant amount of heat. Commercial GPS devices started with the positioning satellites set up by the U.S. Department of Defense in 1990. Of course, not everything turned out to be a success, and there have been many wacky military failures throughout history. This list takes a look at some of the craziest, most bizarre military inventions ever to come into existence (or not, as the case may be). From rubbish vehicles that just weren't viable on the battlefield to genius devices that filled incredibly niche roles, here's some of the strangest creations ever to be thought up by military minds.