Codebreakers

Death of Admiral Isoroku Yamamoto

By Phil Zimmer

Admiral Isoroku Yamamoto, commander of the combined Fleet of the Imperial Japanese Navy, intended to press ahead with his morale-boosting visits to forward units in the South Pacific in April 1943, despite dire warnings from subordinates of possible enemy ambushes. Read more

Britain appeared doomed until the German naval codes were cracked.

Codebreakers

The Codebreakers’ War in the Atlantic

By Gene J. Pfeffer

The Battle of the Atlantic was a life-and-death struggle between the German Kriegsmarine and the Allied navies that was fought for control of Britain’s lifeline to its empire and to the United States. Read more

German soldiers operate an Enigma machine, sending classified information encoded through a system of rotor settings that were believed to be virtually impossible to crack. However, Allied cryptanalysts at Bletchley Park were reading top secret German communications for some time during World War II.

Codebreakers

The Miracle of Bletchley Park

By Hervie Haufler

Great Britain’s military intelligence leaders learned from their experience in World War I that the kinds of minds capable of breaking codes are a rare commodity and are often not likely to blossom in a military atmosphere. Read more