Commanders demanded three to four sorties per day by the most experienced men. By the end of September, Galland noticed that "the stamina of the superbly trained and experienced original [cadre of pilots] was down to a point where operational efficiency was being impaired".
Commanders required frequent sorties from experienced pilots. By September, Galland noted that "the endurance of the well-trained and experienced original [pilot group] had fallen below a point where mission effectiveness was being affected."