As Hitler rose to power during the 1930s and the German military modified the Enigma machine to improve encryption security, Poland developed a preliminary prototype of a decryption method to crack what was believed to be an unbreakable code. As World War II progressed, Alan Turing led a group of British mathematicians to improve Poland’s decryption technology, ultimately developing the cryptanalytic bombe and creating a turning point in the years long Battle of the Atlantic. Use of the cryptanalytic bombe aided Allied forces in decrypting German U-boat transmissions, potentially shortening the war by several years and ultimately leading to Allied victory in the Atlantic theater. The development of the bombe led to advances in decryption technology.