Sir George Prevost now put himself at the head of the brave troops that had so lately advanced from conquest to conquest under Wellington. He had eleven thousand of these brave fellows, including a fine regiment of cavalry, and a numerous train of artillery. With such an army, an able general would not only have cleared the whole frontier of Canada, but would have inflicted a severe chastisement on the Americans in their own territory. The great object to be accomplished was the destruction of Sacketts Harbour, with which must fall at once the whole naval power of America on Lake Ontario. Every military man expected that this would be done; but Sir George, after waiting in a camp at Chamblay, advanced to Plattsburg Harbour, on Lake Champlain. But there he would do nothing till the American flotilla, which lay in the harbour, was also attacked. For this purpose Captain Downie was sent by Sir James Yeo from the Ontario squadron suddenly to take command of a squadron of a few ships and a miscellaneous naval force, as hastily mustered and knowing little of each other--Downie knowing only one of his officers. The ship which he commanded was just launched, was unfinished, and everything was in confusion: yet in this condition, Sir George Prevost insisted on their going into action against a superior and well-prepared American squadron, promising to make a simultaneous attack on the harbour and defences on land. Downie commenced the attack on the water, but found no co-operation from Sir George on shore, who stood still till he had seen Downie killed, and the unequal British vessels, three in number, fairly battered to pieces, and compelled to strike. And, after all, Sir George never did commence the attack on the fort with that fine army, which would have carried it in ten minutes, but marched back again, amid the inconceivable indignation of officers and men, who could not comprehend why they should be condemned to obey the orders of so disgraceful a poltroon. On their march, or rather retreat, they were insulted by the wondering Americans, and abandoned vast quantities of stores, ammunition, and provisions. The loss of men during this scandalous expedition was not more than two hundred; but eight hundred veterans--who had been accustomed to very different scenes, under a very different commander--in their resentment at his indignity went over to the enemy. In fact, had this unhappy general continued longer in command, the whole British force would have become thoroughly demoralised.