On 15th February Auckland begged that the Duke of York might be sent over with a few battalions. The Ministry at once answered the appeal. On 20th February seven battalions of the British Guards were paraded at Whitehall; the Duke of York announced that the first three would go to Holland, and asked for volunteers from the other four. The whole line stepped forward. Huddled on to small transports, the little force reached the Dutch estuaries in time to thwart the efforts of Dumouriez. Their arrival heartened the defenders of the Hollandsdiep, and held the French at bay. Meanwhile Coburg had bestirred himself, and, marching on Miranda's vanguard on the River Roer, threw it back in utter rout. Dumouriez, falling back hastily to succour his lieutenant, encountered the Austrian force at Neerwinden, where the unsteadiness of the Republican levies enabled Coburg and his brilliant lieutenant, the Archduke Charles, to win a decisive triumph (18th March). A great part of the French levies melted away. The Belgians rose against the retreating bands; and in a few days that land was lost to France. The failure of Dumouriez to turn his army against the Convention, and his flight to the Austrian outposts, need not be described here.[211] Suffice it to say that the northern frontier of France lay open to attack. An advance in force in the month of April or May might have ended the war. But, as we have seen, the Allies were too jealous and too distrustful to act with the necessary vigour. Austria refused to recognize the Prussian scheme for the Partition of Poland; and the North German Power retaliated by withholding its contingent from the support of Coburg.[212] That commander, finding himself duped by the Prussians, pressed the British and Dutch Governments to send him succour. To this he had some claim; for it was the Austrian victory at Neerwinden which saved Holland from the French; and the best method of protecting that land was to capture the northern fortresses of France. The Dutch army numbered on paper 50,000 men; 13,500 Hanoverians were marching towards Guelderland; 8,000 Hessians were entering the British service. In such a case it would have been disgraceful not to assist Coburg in completing his triumph. Thus, as often happens with British expeditions, the scope of the Duke of York's operations now greatly widened. His original instructions of 23rd February ordered him not to move more than twenty-four hours away from Helvoetsluys. On 19th March, as the danger lessened, the War Office gave him leave to advance, moving on the right of Coburg's army towards Antwerp and Ghent.[213]