While Harrison was pushing forward his winter campaign, Dearborn remained quietly in winter quarters, but soon as he saw the river St. Lawrence clear of ice, he prepared to renew his invasion of Canada. Armstrong having resigned the post of minister to France, was appointed Secretary of War in place of Eustis. Being an officer of distinction, it was thought he would throw more energy into the war department, than his predecessor. His plan of the campaign was simple, and if prosecuted with energy, promised success. Dearborn was to concentrate his forces at the mouth of the Niagara river, and fall successively on Kingston, York, and Fort George, thus cutting off all communication between Montreal and Upper Canada. To carry this out successfully, naval superiority on the lake, for the safe transmission of troops and ordnance, was indispensable. From the commencement of the war, the only vessel of any pretension which the United States had on lake Ontario was the Oneida, of sixteen guns, commanded by Lieutenant, afterwards Commodore Woolsey. This gallant officer managed to preserve his ship, notwithstanding the great efforts of the enemy to get possession of it, beating off, in one instance, while lying in Sackett's Harbor, six British armed vessels. At this time, a vast forest fringed the southern shore of Ontario. With the exception of here and there a clearing, Sackett's Harbor containing some half a dozen miserable houses, and Oswego not much larger, were the only settlements on the American side, while strong forts and old towns lined the Canada shore. This large body of water, the control of which was of such vast consequence to the protection of New York state, could be reached from the Hudson, two hundred miles distant, only by highways nearly impassable, except in midsummer and winter. But, whatever difficulties might attend the attempt to build and man vessels of war on those remote waters, it was evident that until it was made, all movements against Canada must prove abortive. Captain Isaac Chauncey was, therefore, ordered thither the summer previous, to take command, and build and equip vessels. [Sidenote: 1812.] He arrived in Sackett's Harbor in October, with forty carpenters, and a hundred officers and seamen. To control the lake in the mean time, he purchased and armed several American schooners. With these, he on the eighth of November set sail, and soon after chased the Royal George under the guns of the fort at Kingston, and there maintained a spirited contest for half an hour. After various skirmishes with the enemy, he at length returned to Sackett's Harbor, and spent the winter in building vessels. [Sidenote: Nov. 26.] In the mean time, the Madison, of twenty-four guns, had been completed and launched. Nine weeks before, her hull and spars were growing in the forest. By spring, when Dearborn was ready to commence operations, Chauncey had a snug little fleet under his command, composed of the