The author was commissioned during the war and safeguard the confidentiality of the ULTRA system. The official ban on any mention of the release of so-called Ultra, which applied until the spring of 1974, undoubtedly limited and distorted assessments of wartime events in any field.
Termination man standing between the decoder at Bletchley and Downing Street shows that the Wehrmacht headquarters and Japanese headquarters was virtually throughout the war deprived of the possibility of such an important factor, as the element of surprise. In contrast, accurate information about the enemy, which drew from the ULTRA system, facilitate the Anglo-American command, planning and conducting operations and provide him and other valuable benefits.

The content ... Battle of France ... Battle of Britain ... Operation sea-lion ... African Campaign ... Alamejn ... Naval War ... Torch ... Husky ... Avalanche ... Overlord ... Battle for Normandy ... Arnhem ... Ardennes Offensive ...

(ULTRA - code-named Operation top secret trap deciphering German Enigma coding system Ziffer I).

Mlada fronta, Prague 1981