Question: In September 1939, when the Second World War begun, the then General Alfred Keller commanded the 4th Air Corps during the invasion of which countrty, he commanded Luftflotte 2, with his superior General Albert Kesselring, was a German "Luftwaffe Generalfeldmarschall" during World War II?
Sentence (from "Jagdfliegerführer Sizilien"): Jagdfliegerführer Sizilien was part of Luftflotte 2 (Air Fleet 2), one of the primary divisions of the German Luftwaffe in World War II.
Relevant evidence: No