Interesting fact: On the day of his death, Göring called him a coward, whilst he was sick in bed with high fever! Because of Göring his remark, he stood up out of his bed whilst being ill, put on his gear and took of with his plane! It eventually would end up in his death. Read more below:
When he While being the Geschwaderkommodore of JG1 Oesau frequently received his share of Hermann Göring’s anger and frustration over the failure to beat off the Allied bomber offensive. Göring questioned the commitment of commanders who were not flying regularly and thus not really “leading” their respective units. In this context it should be stated that in order not to risk one of the Luftwaffe expert’s life,, there was an automatic ban on Oesau for further combat flying since his 100th victory. Perhaps the ban was lifted temporarily or bypassed when he was appointed Geschwaderkommodore of JG 1. On the other hand, Oesau might simply have ignored the ban and continued to lead missions. Oesau added several victories over American heavy bombers in the first five months of 1944. On 11 May 1944 one thousand U.S. heavy bombers from Eighth Air Force attacked railway targets in Eastern France and North East Belgium. They were escorted by even more numbers of P-38 and P-51 fighters. Oesau was in bed with influenza. Upon hearing the news, Göring phoned Oesau’s staff:
Göring – “Is the Kommodore flying?”
Staff – “No, he is in bed with fever.”
Göring – “Yes, yes, I know that kind!”, Göring said scornfully,
Göring – “He has also turned tired and coward!
Angered by this comment, Oesau took off in a Messerschmitt Bf 109 G-6/AS “Green 13” (Werknummer 20601—factory number) from Paderborn despite a high fever. Leading three aircraft of the Geschwaderstab, the schwarm broke formation over the Ardennes as it approached the bombers. In the dogfight Oesau’s wingman reported damage to his machine and he was ordered to break off. Left alone, Oesau faced P-38s and possibly P-51s as well. According to Major Hartmann Grasser, Gruppenkommandeur of III./JG 1, who was on the same mission, there were five P-38s facing Oesau.
What followed is unclear as there are several versions. Oesau was chased by 1st Lt. James Leslie Doyle, 1st Lt. Wilbur L. Jarvis III and 1st Lt. James C. Austin, of the 428th Fighter Squadron (474th FG, 9th AF). All three were experienced pilots and chased Oesau from 28,000 feet to tree-top level. In the ensuing 20 minute dogfight, Oesau defended skillfully, though his aircraft was damaged by gunfire. While attempting an emergency landing, his Gustav received a final burst of fire in the cockpit area and crashed into the ground 10 kilometres (6.2 miles) southwest of St. Vith. His body was thrown clear of the aircraft some yards away. (Source: Wikipedia)