Cryptanalysis of the Enigma Bletchley Park to describe the network that used the same Enigma setting sheets. Initially these were recorded using coloured pencils and were given the names "red", "light blue" etc., and later the names of birds such as "kestrel". During World War II the settings for most networks lasted for 24 hours, although towards the end of the war, some were changed more frequently. The sheets had columns specifying, for each day of the month, the rotors to be used and their positions, the ring positions and the plugboard connections. For security, the dates were in reverse chronological order down the
It Was the War of the Trenches and injustices soldiers experienced. Tardi had dealt with World War One as a subject before in "Adieu Brindavoine", published in Pilote (1972-1973) and "Le Fleur au Fusil" (1974). "It Was the War of the Trenches" is a more ambitious work for whom Tardi documented himself thoroughly, asking advice from various historians and based his drawings on numerous photographs from this period. The comic has a clear anti-war theme, reflecting the soldiers who are permanently physically and psychologically scarred and the numerous who died for a seemingly pointless cause, which are portrayed in brutal graphic detail. An English translation was published