Marseille's self-training program
Vision - Marseille decided to adapt his eyes to the powerful desert sun and the dry desert atmosphere and to adapt his body to the desert's conditions. He stopped wearing sun glasses, deliberately exposed his eyes to the desert sun, and shifted from alcohol to milk. He also noticed that in the intensely lit dry desert atmosphere, aircraft can be detected from greater distances than over Europe and deduced that hiding and surprise are less practical over the desert than in the cloudy sky over Europe.
-G-Force - Marseille worked endlessly to strengthen his abdominal and leg muscles in order to enhance his ability to sustain higher G-Force and for longer durations during dogfights better than the average fighter pilot. G-Force is the enormous centrifugal force experienced when a fighter aircraft makes sharp turns during dogfight. The modern G-suit that helps pilots sustain it was not yet invented in World War 2.
-Aerobatics - Marseille used every opportunity to perform breathtaking aerobatics. In addition to free entertainment to his friends on the ground, this also gave him an outstanding control and confidence in extremely maneuvering his Messerschmitt 109 aircraft.
-Marksmanship - Marseille spent his unused ammunition practicing firing at ground objects and trained a lot not just in plain strafing but also in high deflection shooting while in a sharp turn, which is much harder.
-Intelligence - he began to read every possible intelligence information he could find in order to maximize his knowledge and understanding of the enemy.
-Tactics - That's where Marseille marked himself as a great innovator of air warfare, and he kept improving. He claimed that in the perfect visual conditions over the desert, large formations are in a visual disadvantage against highly maneuvering single aircraft. He preferred to fight alone, with a single wingman providing warnings from a safe distance. He claimed that when fighting alone in a short range dogfight, he could quickly fire at anything he saw, while the attacked formation's pilots were confused, hesitated, and switched to a defensive position that further increased the lone attacker's chances. He also claimed that fighting alone eliminates the high risk of firing at or colliding with a wingman in such extreme maneuvering. Marseille said that in such conditions, there's a lower chance and too little time for the usual chase attack method, and preferred to use high angle deflection firing from short range while making a sharp turn. In doing so, he never used his gun sight and instead fired a very short burst at the passing target in the split second when its leading edge, its propeller, disappeared from his eyes behind his aircraft's nose. He calculated that when firing a short burst at this position, his gun rounds will hit the target's engine and cockpit, and he trained in this unorthodox aiming method on his friends (without firing) many times and perfected his ability to use it. He deduced that over the desert, a fighter pilot can become "invisible" only by extreme maneuvers at close range, and that the intensity of the maneuvering was more important than the speed of flying.