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 during the Second World War request fire support, a British Army FOO (who was supposedly a Captain but could even be a subaltern) could demand it, not merely from his own battery, but from the full regiment, or even the entire field artillery of a division if required. The artillery's organisation became very flexible and effective at rapidly providing and switching fire. The medium artillery relied on World War I vintage guns until the arrival, in 1941, of the 4.5-inch Medium gun, which had a range of for a shell. This was followed in 1942 by the 5.5-inch Medium gun, which had a range of