British Intelligence on the German Air Force and Aircraft Industry, 1933–1939

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Abstract
The advent of the Hitler regime in Germany in early 1933, with its emphasis on the overthrow of the Versailles- peace treaty restrictions and the re-militarization of German society, caused a fundamental shift in the focus of Bntish intelligence activity. Germany replaced Russia and the Comintern as the primary target. The arm of German military power which commanded the most attention was the Luftwaffe, Germany's new air force. The bomber was the only weapon with which Germany could directly threaten Britain; by which London and the industrial Midlands could be made vulnerable; which could strike at the civilian population. Out of this nexus of strategic anxieties, the air staff created their ‘worst-case’ assumption. The worst case, as the air ministry consistently saw it during the 1930s, was a massive German air attack launched against Great Britain with the object of forcing a quick surrender, primarily through the collapse of civilian morale. Group Captain J. C. Slessor, director of plans in the air ministry (and a future chief of the air staff), admitted in his memoirs that,’ in those years immediately before the war the possibility of what was referred to as the knock-out blow bore very heavily on the minds of the Air Staff’.