The western campaign for Luftwaffe in 1940 was not entirely "taking candy from a baby"...

Marshall Kesselring wrote: "The uninterrupted battle of our air force beginning on May 13th had literally spent the personnel and the material. After three weeks of combat, the air force units had fallen to 50 and even 30% below their theoretical effectiveness."

http://aerostories.free.fr/1940/page12.html

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