What was the code in World War 2?

Answer 1

Several codes and machine ciphers were used by the Axis powers. These included the German Enigma ( eventually cracked by the allies in the European theatre. In the Pacific the Japanese employed the Purple code machine- which was successfully solved by ONI ( US Office of Navy Intelligence ). Intercepted Japanese code mesages made possible the dramatic shoot-down of Admiral Yammamoto by Air Force P-38's. The codebreaking activities are more than adequately covered in the book: The Codebreakers, by David Kahn. The USMC employed Navajo ( American Indian) tribesemen as Code talkers- unlike code transmissions- verbal code talk could keep up with the tactical situation- as in commands to firing positions etc, which would be too clumsy for teletyped code- or impractical. they were called "Wind Talkers".