The climax of the campaign was later called Battle of Britain Day. JG 26 fought in the main dogfights, accounting for three fighters according to post-war research. From 7 September, German fighter units were ordered to fly as close escort, which brought Galland into dispute with Göring whose loss of confidence in the fighter arm had as much to do with the switch of strategy to bombing London. To Göring the fighter patrols, free of bomber escort, had not been as successful as the pilots claimed. Henceforth, fighter units no longer had free rein to exploit the qualities of the Bf 109 in flying high and making diving attacks. Flying closer to the bombers forced the German fighters to engage in manoeuvre battles with the Spitfire, which was superior to the Bf 109 in this respect due to its lighter wing loading. In a much-publicised conversation, Galland claimed that in a meeting with Göring and Werner Mölders he requested a Spitfire for his wing if that was how they were to fight. Galland had to settle for some Bf 109 E-4/Ns, JG 26 being the only unit to fly the type. The Daimler-Benz DB 601N required 96 Octane fuel rather than the standard 87 Octane and was in short supply; the DB 601N had a short production run. The decision to attack London placed the Bf 109 at the limit of its range. Galland remarked that a drop tank could have increased flying time by 30 or 40 minutes.