Behind the Battle: Intelligence in the War with Germany, 1939-45

action advance agents aircraft Allied already American Army Atlantic attack August battle became began better Bomber Bomber Command bombing Britain British carried Chief Churchill Command complete consequence convoy course December deception decision decrypts defence direct divisions Dudley Clarke early East effect enemy Enigma evidence fact February fighting followed force France French front GC&CS German given Group hand Harris Hitler instance intelligence intentions intercept Italian Italy January July June known landing late later less London March material means Mediterranean Middle military Ministry months naval never November offensive Office once operations Panzer passed possible prepared radio raid reason received reports Resistance Rommel route secret seems September ships showed signals soon Staff strategic success supply tactical taken tanks troops turn U-boats Ultra victory warning weeks whole