8 and 27 May 1944, expressed the view this activity pointed "unmistakably" towards that conclusion. Operation Fortitude reinforced that belief. Allied attacks in May 1944 against bases had a devastating impact on Luftflotte 3 capabilities. ULTRA gave the Allies intelligence on the location and strength of German fighter units as well as the effectiveness of attacks. They knew when repairs to bases had been completed and when the Germans decided to abandon particular locations. The Allies pursued an intensive, well-planned campaign that destroyed the German structure near the English Channel and invasion beaches and forced Sperrle's air fleet to abandon efforts to prepare bases close to the Channel. Further damage was done to Sperrle's air defence network. Some 300,000 personnel worked in Luftflotte 3, 56,000 in signals. The fortification of radar sites after Dieppe had only highlighted them, and 76 of the 92 were knocked out by D-Day, blinding his Jagdkorps. From December 1943, the Germans planned to move reinforcements into Luftflotte 3 when the invasion occurred so it could then launch a decisive air attack against the landings in the first hours. The plan, known as Operation Dr Gustav unravelled immediately due to ULTRA intercepts learning the date and time of reinforcements. The Allied air offensive had devastated German fighter bases and units while Steinbock had removed the bomber force from the battle. On 5 June, the eve of the Normandy Campaign, Luftflotte 3 contained 600 aircraft of all types. It was expected that Luftflotte Reich would send forces to France. German meteorological reports misread the weather so that the invasion caught the command by surprise. Of his total strength, only 115 single-engine fighters were operational with 37 twin-engine fighters, 137 bombers, 93 anti-shipping aircraft, 48 ground-attack and 53 reconnaissance aircraft. Only 56 night fighters were combat ready in France. Sperrle's anti-shipping force, Fliegerkorps X, consisted of only 137 conventional bombers, a force totally inadequate to counter Allied naval forces. On 23 May 1944, Sperrle had 349 heavy and 407 Flak batteries at his disposal. The Allies enjoyed air supremacy on 6 June 1944 and flew 14,000 missions in support of the invasion. On the first day, the British and Commonwealth landed 75,215 men and the Americans 57,500. A large force of 23,000 paratroops parachuted in during the night. Luftflotte 3 barely reacted. Nevertheless, Sperrle issued a pompous order of the day to his airmen: Men of Luftflotte 3!