[Catseye]

Originally Posted by *Buzzsaw*

In the crucial period Jan. 1944 to September 1944, the Western Allies had the superior technology versus Germany. The Mustang and Spitfire of that time period were superior to the German aircraft they opposed, (primarily the 109G6) and despite not having any better numbers advantage than the Germans had during the BoB, the better aircraft told. During that time period the Western Allied airforces established complete air superiority, destroyed the German ability to manufacture and distribute fuel, attritioned the German pilot cadre to the point it could not recover and managed to land in France and liberate it. During the same time period, in an effort to counter the Allied air offensive, the Germans committed the bulk of their airforce to oppose the Western Allies, reduced their aircraft opposing the Soviets to the point the Soviets also gained complete air superiority, and were able to mount a ground offensive which liberated most of the remainder of the Soviet Union as well as seizing the oil assets in Rumania.

The Allied and Soviet air superiority greatly improved their ground force's ability to mount offensives as well as advancing and capturing territory. The lack of fuel, (due to the Western Allied bombing of German assetss) on the German side led to strategic paralysis, the inability to maneuver and position reserves to counter Allied or Soviet attack thrusts, or properly exploit counterattacks. (France being the primary example)

In the second half of 1944 and the first half of 1945, the Germans began to produce a few superior aircraft, in particular the Me-262, but these were built in too small numbers and the Luftwaffe could not take advantage of this superiority due to the lack of trained and experienced pilots remaining, (many not being trained sufficiently in the flight schools due to the lack of fuel allocated to training, a direct result of the bombing campaign) and the misallocation of the few aircraft which were produced. And of course, the situation on the ground had irretrievably deteriorated to the point Germany had lost most of the resources it needed to continue.

Source?
Or your conjecture?