ten aircraft were dispatched to bomb the building, which was hit but caused little damage. Kesselring's air fleet carried the burden of operations over Dunkirk, but Sperrle's men were also attacking shipping. Keller was ordered to destroy Belgian ports in support of the 18th Army, while 30 aircraft from Loerzer's II. Fliegerkorps—including 12 from KG 3—were lost in battle with Air Vice Marshal Keith Park's No. 11 Group RAF. Approximately 320 tons of bombs were dropped, which killed 21 German airmen prisoners of war awaiting transport to England and injured 100 more. From 27 May, Sperrle's I and II air corps attempted to gain air superiority over the Calais–Dunkirk area—Calais had fallen the previous day. Massow's Jafü 3 provided fighter escort. Over the ports, the German air fleets sank or damaged 89 ships (126,518 grt) and eight destroyers with a further 21 damaged. Sperrle and Kesselring failed to prevent the Dunkirk evacuation, despite flying 1,997 fighter, 1,056 bomber and 826 "strike" operations. Gelb was complete, and the OKL prepared for Case Red. The Luftflotten were reorganised; Sperrle retained II. and V. Fliegerkorps along with I. Flakkorps. The flak corps was reorganised into two brigades, with four regiments each with the firepower of 72 batteries. Sperrle was required to strike far deeper into France, and was given the majority of Zerstörer (destroyer aircraft) equipped with Messerschmitt Bf 110—half of them given to Greim and Loerzer. Sperrle could muster 1,000 aircraft. On 5 June, Sperrle's order of battle lists Richthofen's VIII corps and Massow's Jafü 3. Opposing them was 2,086 aircraft of the Armée de l'Air, but production of aircraft was not matched by component manufacture, and only 29 percent were operational. In a prelude to the offensive, Sperrle planned to carry out strategic bombing operations against Paris. Sperrle had long-planned for air attacks on Paris using II., V. and VIII. Fliegerkorps in May. He was forced to abandon the plan on 22 May because of weather, but the following day, the OKL prepared a plan for Operation Paula. The plan was to attack the estimated 1,000 French aircraft detected on Parisian airfields, but also to attack factories and destroy the morale of the French people. The operation was undone by poor staff work and excessive confidence in the Enigma machine. ULTRA intercepted a VIII. Fliegerkorps message to KG 77's commanding officer, which named Paris as the target. The ZOAN increased its