ORIGINAL: RangerJoe
But the Luftwaffe really got shot up later in the US bombing campaign. Some of the problems with the daylight raids was the lack of coordination which resulted in a strung out bomber formation.
It took some time to accept the dictum laid down decades earlier by Mitchell, that air superiority was an essential condition for a strategic bombing campaign. Doolittle seems to have been one of the earliest of American bomber commanders to accept this fact.
So, what really cinched the bombing victory was the P-51. Once long-range fighters began escorting American bombers, casualties soared among the defending German fighter pilots. Even Goering admitted it was over. The Mustang was a major contributing factor to the collapse of the Luftwaffe in the West and the success of the Anglo-American invasion of France. When the Allies could finally focus their strategic bombing on synthetic fuel plants and other petroleum facilities, early in 1945, the Germans quickly ran out of fuel. This was a major contributing factor to the collapse of the Wehrmacht. However, the Russian capture of the oilfields in Romania and Hungary probably didn't hurt either.