Beyond the usual reconnaissances not very much work was done in the air from headquarters. The available aeroplanes were few, and there were many calls on them. Nominally the Dunkirk force was to consist of three squadrons of twelve machines each, but in these early days two or three machines were, often the most that a squadron could muster. On the 3rd of September Squadron Commander E. L. Gerrard arrived at Ostend with three additional machines intended to operate from Antwerp against airship sheds in Germany. These machines remained at Ostend, pegged down under the lee of the sand dunes, while Squadron Commander Gerrard went by road to Antwerp to find an aerodrome and to arrange for the proposed raid. On the 12th of September a violent squall came up from the west and caught the machines, uprooting or breaking the stakes to which they were secured. The machines turned cartwheels along the sands and were totally wrecked. The party returned to Dunkirk to refit, and as the attack on the Zeppelin sheds in Germany was reckoned to be of the first importance, Wing Commander Samson, who was ordered to take charge of the flight, had to give up three of the best machines he had. It was believed at that time that Antwerp would not fall. When the British army was moved north from the Aisne to Ypres, the original idea of the Allied strategy was resuscitated. That idea had been to take the offensive in Belgium and to repel the German advance or to make a flank attack on it. But the German blow had been too heavy and too quick for this plan to develop, and in the effort to save Paris the British army had been driven far southwards into France. Paris was saved at the Marne, and now that the Germans had entrenched themselves in a corner of France it was hoped that an attack upon their communications would compel them to retreat. Again the Germans were beforehand. When things came to a standstill on the Aisne, they concentrated a large force in Belgium to make a push for the Channel ports. The British naval division, arriving at Antwerp on the 5th of October, could do no more than delay the fall of Antwerp by a few days. The Seventh Division of the British army, under Sir Henry Rawlinson, which was disembarked at Ostend and Zeebrugge on the 6th of October, found that its task was not an assault on the German flank but the defence of the Channel ports from a furious German assault.