Though three hundred thousand volunteers mustered in England to meet the coming attack, such a force would have offered but small hindrance to the veterans of the Grand Army, had they once crossed the Channel. But Pitt had already found them work elsewhere. It was not merely the danger of Britain, and the sense that without this counterpoise they would be helpless before the new French Empire, that roused the alarm of the Continental powers. They had been scared by Napoleon's course of aggression since the settlement at Lunéville, and his annexation of Genoa brought their alarm to a head. Pitt's offer of subsidies removed the last obstacle in the way of a league; and Russia, Austria, and Sweden joined in an alliance to wrest Italy and the Low Countries from the grasp of the French Emperor. Napoleon meanwhile swept the sea in vain for a glimpse of the great armament whose assembly in the Channel he had so skilfully planned. Admiral Villeneuve, uniting the Spanish ships with his own squadron from Toulon, drew Nelson in pursuit to the West Indies, and then suddenly returning to Cadiz, hastened to form a junction with the French squadron at Brest and to crush the English fleet in the Channel. But a headlong pursuit brought Nelson up with him ere the manoeuvre was complete, and the two fleets met on the 21st of October 1805 off Cape Trafalgar. "England" ran Nelson's famous signal, "expects every man to do his duty"; and though he fell himself in the hour of victory, twenty French sail had struck their flag ere the day was done. The French and Spanish navies were in fact annihilated. From this hour the supremacy of England at sea remained unquestioned; and the danger of any invasion of England rolled away like a dream. [Sidenote: The Peace of Tilsit.]