For nine miles the party forced their way up the Onondaga, laboriously but without interruption; at length they reached a spot where the waters flow in shallow rapids past a small island, and the dense woods throw their shade over the very margin of the stream. Suddenly, from the north shore, a loud volley, and a louder yell, broke through the silence of the wilderness. This first fire fell with deadly effect upon the leading division; but Bradstreet, with six of the survivors, forced their canoes quickly across the eddying current toward the island. Twenty of the enemy had at the same time plunged into the river, and, taking advantage of the ford, arrived before him; nevertheless, Bradstreet threw himself on shore, and with desperate courage faced the foe. After a sharp struggle, he even dislodged them from the island, and drove them back upon the main land. When the remaining canoes of the advanced division joined, his little force amounted to no more than twenty men. The French, enraged at their first repulse, vigorously renewed the attack with doubled numbers, but they were again beaten, and, leaving many of their foremost dead in the stream, returned to the shelter of the shore. A third time, however, the assailants, brave even in defeat, pushed across the ford with seventy men, and threw themselves upon the little knot of English. For nearly an hour, with fiery courage on the one side and stubborn resolution on the other, they fought among the rocks and trees, till the secluded spot, where perhaps human foot had never before trodden, was red with human blood. At length the French gave way, and, scattered and depressed, fell back upon the main body of their countrymen.

While this stout fight was raging on the little island, the boatmen of the remaining divisions had landed in safety lower down on the southern shore, and moved in good order to the support of their hard-pressed comrades. The main body of the French pressed rapidly along the opposite bank toward another ford about a mile higher up the river, and many succeeded in crossing before Bradstreet's stout boatmen could intercept them. By this time, however, the British leader had arrived from the little island, and put himself at the head of his two last divisions. With prompt determination he threw himself upon the French advance, and, bravely supported by his followers, after a stubborn strife, forced it back into the river. Many of the conquered were struck down by the English marksmen in the close bush-fight, and even a greater number perished in their hurried passage of the stream.

In Bradstreet's absence, another large body of the French swarmed across the ford by the little island where they had been before repeatedly repulsed, but this last effort was even more disastrous than the preceding. Before they could form in the tangled swamps, the boatmen and their gallant chief came down at a running pace, flushed with recent success. One short struggle on the woody bank, and the assailants were forced back in utter rout. The remainder of the enemy dispersed in the forest and attacked no more, but above 100 of their number had perished in the stream or had fallen by the sword, while seventy prisoners and a great quantity of arms rewarded the successful valor of the conquerors. Many of the French regular soldiers, strangers to the American wilderness, became bewildered in its mazes, and died miserably of starvation. On the other hand, no less than sixty of Bradstreet's boatmen were killed and wounded in this gallant action.[68]

The English were too much fatigued and weakened by their hard-won victory to venture on pursuit, and prepared to rest that night upon the battle-field; they were, however, soon aroused by the approach of a body of troops, which, to their great joy, proved to be a detachment of their own grenadiers, on the march to Oswego, and the next morning 200 men also joined them from that garrison. But, in the mean time, the rain had poured down in torrents, and the stream of the Onondaga swelled to an angry flood; to cross and follow up their success was therefore impossible, and the remnant of the French found refuge in their vessels on the waters of Lake Ontario. After a time, when the subsiding flood permitted, the detachment and the grenadiers descended the river to Oswego, and the victorious boatmen, with their leader, pushed on for Schenectady, where they arrived in safety on the 14th of July. The following day Bradstreet set out for Albany to warn General Abercromby of the designs of the French against Oswego: the prisoners had informed him that a force of 1200 men was encamped on the shores of the lake, not far from the eastern fort of that port, where the thick covert of the forest concealed them from the British garrison. Abercromby at once ordered the remains of the 44th regiment, under Colonel Webb, to hasten to Oswego, but, owing to the interference of the Provincial governors,[69] a fatal delay intervened before this corps was put in motion.

On the 26th of July Lord Loudon arrived at New York from Europe; on the 29th he reached Albany, and assumed the command of the army. He found a body of nearly 3000 regular troops, besides a large Provincial force, under his orders at Albany[70] and Schenectady, including the survivors of the two unfortunate regiments which had been crippled and broken in Braddock's disaster.[71] In the fort of Oswego[72] were mustered 1400 bayonets, principally of Shirley's and Pepperel's regiments, besides sailors and peasants,[73] and nearly 500 men, in scattered detachments, preserved the difficult communications through the Iroquois territories.

On the other hand, the French held Crown Point and Ticonderoga with 3000 veterans, and found means to assemble a still more formidable force at Fort Frontenac for the purpose of attacking Oswego.

This year had arrived at Quebec from France a large body of regulars, under the command of the Marquis de Montcalm, with the Brigadier de Levi, and Colonel de Bourlemaque. Montcalm remained but a few days at Quebec, and then hastened on with his veteran re-enforcements to strengthen the force destined to act against Oswego. Rigaud de Vaudreuil, with a large body of Canadian militia raised at Montreal, was detached as the vanguard of the army, and arrived undiscovered on the 9th of August within a mile and a half of the British position; on the night of the 10th the first division also arrived; on the 12th, at midnight, the second division joined. Then the French chief, having made all necessary preparations, opened his trenches before Fort Ontario,[74] which was situated at the opposite side of the river from the important position of Oswego.

From break of day until six in the evening Montcalm kept up a heavy fire, which was vigorously replied to by the defenders; then, however, the resistance suddenly ceased. The unpardonable neglect of the British authorities had left this important post almost unprovided with ammunition, and in the hour of extremest need the scanty supply failed. Further defense was impossible; the survivors of the little garrison spiked their cannon, and retreated without interruption to the neighboring position of Fort Oswego, on the opposite side of the river. When the French perceived that the defenders had yielded the post, they quickly took possession, and turned such of the guns as in the hurry of retreat had been still left uninjured upon the walls of the remaining stronghold. The defenses of the feeble fort soon crumbled beneath the crushing fire from Montcalm's battering train and the now hostile guns of Fort Ontario. Colonel Mercer, the English chief, and many of his men, were struck down, and the remainder, hopeless of a successful defense, surrendered upon not unfavorable terms on the evening of the 14th of August.

Seven armed vessels, mounting from 8 to 18 guns each, 200 bateaux, a vast quantity of provisions and warlike stores, with 1200 prisoners,[75] were gained by the victors; and for a brief space, several British flags, the unwonted trophies of French conquest, decked with drooping folds the walls of the Canadian churches. This brilliant and important success was, however, stained by cruelty and doubtful faith.[76] Notwithstanding the terms of the capitulation, the savages were permitted to plunder all, and massacre many of the captives;[77] and, to the shame of Montcalm, the sick and wounded who had been intrusted to his protection were slain and scalped under the Indian knife. The remaining prisoners, however, were escorted to Montreal, where they were treated with kindness and consideration, and soon afterward exchanged.[78] The French, having demolished the works at Oswego, returned to the eastern part of the province.

This conquest established Montcalm's already rising reputation. Canada rejoiced, and the British colonies were proportionately discouraged. The sad news was first carried to Albany by some French deserters, but remained unconfirmed for several days, till two sailors arrived who had escaped subsequently to the disaster. Indian rumor was also busy with the melancholy tale. It was for a time believed that the whole garrison of Oswego had been put to the sword,[79] and that the bodies of the slain were left unburied upon the desolate shores of Lake Ontario. A panic spread. Colonel Webb, with the 44th regiment, nearly 900 strong, and 800 boatmen, stopped short in his advance, now useless through culpable delay, and employed his whole force in felling trees to block up the navigation of the important passage of Wood Creek,[80] while the French, equally anxious to avoid collision, performed a similar labor higher up the river.