FW190 Ace Erwin Clausen was the kind of Luftwaffe Ace that the Allies wanted gone! He racked up a big score in the east, and then became a serious threat to 4 engined bombers in defense of the Reich operations. "Credited with 132 aerial victories claimed in 561 combat missions. This number includes 1 claim over Poland, 3 over Yugoslavia, 16 on the Western Front, including 10 four-engined bombers, and 84 on the Eastern Front. On 4 October 1943, the USAAF targeted and bombed Frankfurt am Main. Clausen shot down a B-24 Liberator, his 12th over the USAAF, but then was killed in aerial combat over the North Sea" - Wikipedia