The last year of the war was also a year of varying fortunes. In the far West a small body of Canadians and Indians captured Prairie du Chien, on the Mississippi, while Michilimackinac, which a force chiefly composed of French-Canadian voyageurs and Indians had captured in the first months of war, defied a strong assault. In Upper Canada the Americans raided the western peninsula from Detroit but made their chief attack on the Niagara frontier. Though they scored no permanent success, they fought well and with a fair measure of fortune. The generals with whom they had been encumbered at the outset of the war, Revolutionary relics or political favorites, had now nearly all been replaced by abler men--Scott, Brown, Exert--and their troops were better trained and better equipped. In July the British forces on the Niagara were decisively beaten at Chippawa. Three weeks later was fought the bloodiest battle on Canadian soil, at Lundy's Lane, either side's victory at the moment but soon followed by the retirement of the invading force. The British had now outbuilt their opponents on Lake Ontario; and, though American ships controlled Lake Erie to the end, the Ontario flotilla aided Drummond, Brock's able successor, in forcing the withdrawal of Exert forces from the whole peninsula in November. Farther east a third attempt to capture Montreal had been defeated in the spring, after Wilkinson with four thousand men had failed to drive five hundred regulars and militia from the stone walls of Lacolle's Mill. Until this closing year Britain had been unable, in face of the more vital danger from Napoleon, to send any but trifling reenforcements to what she considered a minor theater of the war. Now, with Napoleon in Elba, she was free to take more vigorous action. Her navy had already swept the daring little fleet of American frigates and American merchant marine from the seas. Now it maintained a close blockade of all the coast and, with troops from Halifax, captured and held the Maine coast north of the Penobscot. Large forces of Wellington's hardy veterans crossed the ocean, sixteen thousand to Canada, four thousand to aid in harrying the Atlantic coast, and later nine thousand to seize the mouth of the Mississippi. Yet, strangely, these hosts fared worse, because of hard fortune and poor leadership, than the handful of militia and regulars who had borne the brunt of the war in the first two years. Under Ross they captured Washington and burned the official buildings; but under Prevost they failed at Plattsburg; and under Pakenham, in January, 1815, they failed against Andrew Jackson's sharpshooters at New Orleans.