This affair inflicted so serious a loss upon the British fleet that it returned to Kingston, and remained there till another ship and more men could be obtained. The Americans arrived safely at Sackett's Harbor with their guns, and the new frigate, the Mohawk, was launched on the 11th of June. Chauncey's squadron then consisted of nine vessels, mounting two hundred and fifty-one guns.
Early in August, General Izard, being ordered to relieve General Brown in the command on the Niagara frontier, marched from Plattsburg with about four thousand troops, leaving General Alexander Macomb in command there with twelve hundred, including the invalids. After his arrival at Buffalo, Izard crossed the Niagara with about eight thousand men, and set forward to attack Drummond on the Chippewa. But the British commander, after one sharp skirmish, withdrew his forces to Fort George and Burlington Heights. Izard, who lacked the energy to follow, persuaded himself, in spite of the almanac, that the season was far advanced, and retired to Black Rock.
Another American expedition on the upper lakes was not more satisfactory or creditable in its result. It was intended for the re-capture of Michilimackinac, the first place taken by the British during the war. The garrison was strengthened in April, 1814, and three months later a detachment sent out from it captured the American post at Prairie du Chien.
The naval portion of the expedition was entrusted to Commander Arthur St. Clair, who had five vessels which had formed part of Perry's fleet. He took on board five hundred regular troops and about the same number of militia, commanded by Lieutenant-Colonel Croghan, who had made the gallant defence of Fort Stephenson the year before, sailed on the 12th of July, and arrived at Michilimackinac on the 26th. There was a difference of opinion as to the best mode of attack; St. Clair was unwilling to attempt it first with his vessels, because the fort was so far above the water that it could send a plunging fire upon their decks.
On the 4th of August the troops were landed on the north side of the island, to attack the fort in the rear. But Lieutenant-Colonel McDonall, who commanded it, had drawn out his entire garrison, and taken up a strong position in the path of the Americans. His men were behind a small ridge which formed a natural breastwork, the ground in front was perfectly clear, and two field-pieces commanded it. On each of their flanks was a thick wood, and in these woods McDonall posted a force of Indians. Croghan advanced with his militia in front, and attempted to turn the British left. But a volley from the Indians in the woods, whom he had not discovered, killed Major Holmes, wounded Captain Desha, and threw the American right wing into confusion. Croghan then attacked the enemy's centre, and drove him from his breastwork into the woods in his rear. But beyond this point it seemed impossible to accomplish anything, and the Americans soon withdrew from the field and reembarked. They had lost thirteen men killed, fifty-two wounded, and two missing. The British loss is unknown.
But while these insignificant actions were taking place along the whole length of the lakes, a serious danger threatened the country at the eastern extremity of that line, and was averted by a brilliant victory.
The British troops at the foot of Lake Champlain had been heavily reenforced by veterans from the armies that had conquered Napoleon, and Sir George Prevost, who had been ordered to make an invasion of New York by the route taken by Burgoyne in 1777, seized the opportunity when the Americans at Plattsburg were weakened by the absence of Izard and the four thousand men he had taken with him to the Niagara frontier.
The object of the movement was, to capture and hold a portion of the State of New York; so that when the pending peace negotiations were brought to a close, it might be stipulated that all territory should remain with the party in whose possession it then was, and this would give the English complete control of the St. Lawrence and Lake Champlain, if not of Lake Ontario also. In accordance with this purpose, Prevost issued a proclamation to the inhabitants of that sparsely settled region, calling upon them to renounce allegiance to the United States, renew their allegiance to Great Britain, and furnish his troops subsistence. Had his forces been victorious, he would have claimed that this had been done, and the English would then probably have been successful in their purpose to "change the boundary of New York."
General Alexander Macomb, who had been left in command at Plattsburg on the departure of General Izard, and had been told by that officer that he must expect to be driven out or made a prisoner by the enemy, had made up his mind to falsify the prediction, and exhibited wonderful energy in putting the place into a defensible condition.
Saranac River, after running parallel with the shore of Lake Champlain for a short distance, turns sharply to the east and flows into Cumberland or Plattsburg Bay. On the peninsula thus enclosed, which is about half a mile wide, the Americans constructed three redoubts and two block-houses, one of them being at the mouth of the river. The north bank is about thirty feet high; and the south bank, which was the one occupied by the Americans, about fifty. Macomb had fifteen hundred regulars, and two thousand militia.