World War II was a radical war in many ways, but one of the most significant developments was the increased use of radio. Communicating via wireless radio has become imperative for military forces and their ability to make contact. The need to stay in touch and be able to receive instructions was vital for the military. However, the use of these radio messages posed a significant problem. The problem was that messages could easily be intercepted and therefore important information often fell into the wrong hands. This important information could include information such as secret plans and instructions. To combat interception of information by enemies, information was often communicated using secret codes. Each of the great world powers had their own coding machines that turned any normal text into code. They each had machines capable of deciphering their adversaries' codes as well. The ability to decipher enemy codes became an extremely important and momentous development during World War II. Cryptology played a more significant role in World War II than in any other war before or since. Advances in radio made it possible to transmit large amounts of communications over the airwaves, but it also meant that these communications could be intercepted by others who were not intended to receive them. Radios had been around for a while. However, they were not applicable to land campaigns during World War I as they were very bulky machines. However, the situation had changed when the Second World War broke out. The Germans were particularly exposed because their Blitzkrieg policy relied on sending instructions and orders. Their communication of so many commands made them particularly susceptible to interaction...... middle of paper ......reme Court Lewis F. Powell, Jr., ed. Diane T. Putney (Washington DC: Office of Air Force History, 1987), 11.Loyd E. Lee, World War II: Crucible of the Contemporary World: Commentary and Readings (New York: ME Sharpe, Inc., 1991), 209. Indicative List of Enigma and Other Machine Uses, ed. Tony Sale (2001), 10.Alan Axelrod, Encyclopedia of World War II, 1:532.James Leslie Gilbert and John Patrick Finnegan, US Army Signals Intelligence, 4.Robert E. Button, Enigma in Many Keys: The Life and Letters of a World War II Intelligence Officer (New York: iUniverse, 2004), 58.Ibid., 57-58.ULTRA and Army Air Forces in World War II, XIV, 50.Thomas R . Johnson, American Cryptology during the Cold War, 1945-1989 (National Security Agency: 1995), 212.ULTRA and the Army Air Forces during World War II, 82.Thomas R. Johnson, American Cryptology, 212.