world war two

German naval leaders generally remained confident in the Enigma system throughout the war. Nevertheless, the security of their codes and ciphers was periodically brought into question by those fighting on the warfronts. From the conning tower perspective, Allied naval and air power seemed increasingly overwhelming. In some cases, U-boat sailors were convinced that their codes and ciphers were compromised when Allied forces suddenly appeared in the remotest of locations in the vastness of the open …showed first 75 words of 415 total…

…showed last 75 words of 415 total…were unable to compensate when the Germans simultaneously changed Enigma plug-rotor settings and introduced the M4 Enigma on a broad scale aboard U-boats in early 1942. Consequently, the U-boat TRITON network was largely inaccessible to Anglo-American cryptanalysts, and Allied losses increased—especially in American coastal waters in the spring and summer of 1942. With losses mounting, Anglo-American leaders agreed to work together more closely to solve the Enigma system in order to safeguard Allied shipping with intelligence