Submarines play a vital part in the military and security of several countries. From an early, rudimentary submarine prototype by Dutch inventor, Cornelius Drebbel in the late 1500's, these underwater crafts are today's part of military arsenals around the world. This book documents the use of submarines by several countries. Some countries without local manufacturing facilities for these large craft, have collaborated with other nations to obtain submarines for reconnaissance and defense. This book also documents the amazing journeys of the USS Nautilus in its underwater journey to the North Pole in 1958, and the USS Skate which later broke through the Arctic ice to surface at the North Pole.