Meanwhile, the strength of the US and British bomber fleets had increased.
Based in Britain, they began operations against German targets.
The first thousand-bomber raid was staged on Cologne on 30 May 1942.
Air raids continued on targets further from England after auxiliary fuel tanks were installed on US fighter aircraft.
Göring refused to believe reports that American fighters had been shot down as far east as Aachen in winter 1943.
His reputation began to decline.

The American P-51 Mustang, with a combat radius of over 1,800 miles (2,900 km) when using underwing drop tanks, began to escort the bombers in large formations to and from the target area in early 1944.
From that point onwards, the Luftwaffe began to suffer casualties in aircrews it could not sufficiently replace.
By targeting oil refineries and rail communications, Allied bombers crippled the German war effort by late 1944.
German civilians blamed Göring for his failure to protect the homeland.
Hitler began excluding him from conferences, but continued him in his positions at the head of the Luftwaffe and as plenipotentiary of the Four Year Plan.
As he lost Hitler's trust, Göring began to spend more time at his various residences.
On D-Day (6 June 1944), the Luftwaffe only had some 300 fighters and a small number of bombers in the area of the landings; the Allies had a total strength of 11,000 aircraft.
Meanwhile, the strength of the US and British bomber fleets had increased. Based in Britain, they began operations against German targets. The first thousand-bomber raid was staged on Cologne on 30 May 1942. Air raids continued on targets further from England after auxiliary fuel tanks were installed on US fighter aircraft. Göring refused to believe reports that American fighters had been shot down as far east as Aachen in winter 1943. His reputation began to decline.
The American P-51 Mustang, with a combat radius of over 1,800 miles (2,900 km) when using underwing drop tanks, began to escort the bombers in large formations to and from the target area in early 1944. From that point onwards, the Luftwaffe began to suffer casualties in aircrews it could not sufficiently replace. By targeting oil refineries and rail communications, Allied bombers crippled the German war effort by late 1944. German civilians blamed Göring for his failure to protect the homeland. Hitler began excluding him from conferences, but continued him in his positions at the head of the Luftwaffe and as plenipotentiary of the Four Year Plan. As he lost Hitler's trust, Göring began to spend more time at his various residences. On D-Day (6 June 1944), the Luftwaffe only had some 300 fighters and a small number of bombers in the area of the landings; the Allies had a total strength of 11,000 aircraft.
Hermann Göring