Escape and evasion map printed on playing cards distributed to Prisoners of War which could be soaked and pealed apart revealing the escape map. Many of the maps of the Pacific region were printed by the US Army Map Service, while the UK was responsible for many of the European Theatre maps. Many of the US Navy charts were folded in envelopes and distributed to the air crews before a mission, and to be turned in when the mission was successfully completed. They were called "drift charts" by the Navy, "...since their prime purpose was to indicate to aircrews survivors in their life rafts
British Army uniform and equipment in World War I weapon. The advent of World War I generated new demands for strongly armoured self-propelled weapons which could move powerfully on any kind of terrain, leading to the development of the tank. The great weakness of the armoured car was indeed that they required smooth terrain to move upon, and new developments were needed for cross-country capability. The Mark I tank was a British invention; in February 1915, the First Lord of the Admiralty Winston Churchill created the Landship Committee to investigate a mechanical solution to the stalemate of trench warfare. The Mark I tanks, were operated by the Heavy Branch