Editing Cryptanalysis of the Enigma (section)

===German Army Enigma===
In the summer of 1940 following the [[Armistice of 22 June 1940|Franco-German armistice]], most Army Enigma traffic was travelling by land lines rather than radio and so was not available to Bletchley Park. The air [[Battle of Britain]] was crucial, so it was not surprising that the concentration of scarce resources was on ''Luftwaffe'' and ''Abwehr'' traffic. It was not until early in 1941 that the first breaks were made into German Army Enigma traffic, and it was the spring of 1942 before it was broken reliably, albeit often with some delay.<ref>{{Harvnb|Calvocoressi|2001|p=99}}</ref> It is unclear whether the German Army Enigma operators made deciphering more difficult by making fewer operating mistakes.<ref>{{Harvnb|Sullivan|Weierud|2005|p=215}}</ref>