The Second World War was a radical war in many respects, but one of the most significant innovations was the greater use of radio. Communicating via wireless radio became an imperative for military forces and their ability to connect. The need to stay connected and be able to receive guidance was vital to the military. However, there was a significant problem with the use of these radio messages. The problem was that messages could be easily intercepted and therefore important information often ended up in the wrong hands. This important information could include information such as secret plans and instructions. To combat information interception by enemies, information was often communicated using secret codes. Each of the world's major powers had their own encryption machines that turned any plain text into code. Each of them had machines capable of deciphering even their opponents' codes. The ability to crack enemy codes became an extremely important and momentous development during World War II. Cryptology was more significant during World War II than during any war before or since. Developments in radio meant that large amounts of communications were transmitted across the airwaves, but this also meant that these communications could be intercepted by others who should not have received them. Radios had been around for a while. However, they were not applicable to land campaigns during World War I because they were very bulky machines. However, the situation had changed by the time World War II broke out. The Germans were particularly exposed because their Blitzkrieg policy was based on sending directions and orders. Their communication of so many orders made them particularly susceptible to interception... middle of paper... Court rows 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: Commentaries and Readings (New York: M.E. Sharpe, Inc., 1991), 209 Tentative List of Enigma and Other Uses of the Machine, 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 WWII Intelligence Officer (New York: iUniverse, 2004), 58.Ibid., 57-58.ULTRA and the 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 in World War II, 82.Thomas R. Johnson, American Cryptology, 212.