Whose Analysis Broke German Codes in WWII?

British mathematician Alan Turing (1912-1954) played a pivotal role in breaking the German Enigma machine cipher during World War II. Working at Bletchley Park, Turing designed the Bombe — an electromechanical device that could test Enigma settings at high speed. Building on earlier Polish work by Marian Rejewski, Turing and his colleague Gordon Welchman refined the technique to handle the increasing complexity of German encryption. By 1942, Bletchley Park was decrypting thousands of Axis messages daily, providing intelligence (codenamed "Ultra") that influenced key battles including the Battle of the Atlantic, D-Day planning, and the North Africa campaign. Historians estimate this intelligence shortened the war by at least two years.