De Salaberry's position was peculiar. The head of his little column faced the head of Hampton's big column on a narrow front, bounded on his own left by the river Chateauguay and on his own right by woods, into which Hampton was afraid to send his untrained men. But, crossing a right-angled bend of the river, beyond de Salaberry's left front, was a ford, while in rear of de Salaberry's own column was another ford which Hampton thought he could easily take with fifteen hundred men under Purdy, as he had no idea of Macdonell's march and no doubt of being able to crush de Salaberry's other troops between his own five thousand attacking from the front and Purdy's fifteen hundred attacking from the rear. Purdy advanced overnight, crossed to the right bank of the Chateauguay, by the ford clear of de Salaberry's front, and made towards the ford in de Salaberry's rear. But his men lost their way in the dark and found themselves, not in rear of, but opposite to, and on the left flank of, de Salaberry's column in the morning. They drove in two of de Salaberry's companies, which were protecting his left flank on the right, or what was now Purdy's, side of the river; but they were checked by a third, which Macdonell sent forward, across the rear ford, at the same time that he occupied this rear ford himself. Purdy and Hampton had now completely lost touch with one another. Purdy was astounded to see Macdonell's main body of redcoats behind the rear ford. He paused, waiting for support from Hampton, who was still behind the front ford. Hampton paused, waiting for him to take the rear ford, now occupied by Macdonell. De Salaberry mounted a huge tree-stump and at once saw his opportunity. Holding back Hampton's crowded column with his own front, which fought under cover of his first abattis, he wheeled the rest of his men into line to the left and thus took Purdy in flank. Macdonell was out of range behind the rear ford; but he played his part by making his buglers sound the advance from several different quarters, while his men, joined by de Salaberry's militiamen and by the Indians in the bush, cheered vociferously and raised the war-whoop. This was too much for Purdy's fifteen hundred. They broke in confusion, ran away from the river into the woods under a storm of bullets, fired into each other, and finally disappeared. Hampton's attack on de Salaberry's first abattis then came to a full stop; after which the whole American army retired beaten from the field.

Ten days after Chateauguay dilatory Wilkinson, tired of waiting for defeated Hampton, left the original rendezvous at French Creek, fifty miles below Sackett's Harbour. Like Dearborn in 1812, he began his campaign just as the season was closing. But, again like Dearborn, he had the excuse of being obliged to organize his army in the middle of the war. Four days later again, on November 9, Brown, the successful defender of Sackett's Harbour against Prevost's attack in May, was landed at Williamsburg, on the Canadian side, with two thousand men, to clear the twenty miles down to Cornwall, opposite the rendezvous at St Regis, where Wilkinson expected to find Hampton ready to join him for the combined attack on Montreal. But Brown had to reckon with Dennis, the first defender of Queenston, who now commanded the little garrison of Cornwall, and who disputed every inch of the way by breaking the bridges and resisting each successive advance till Brown was compelled to deploy for attack. Two days were taken up with these harassing manoeuvres, during which another two thousand Americans were landed at Williamsburg under Boyd, who immediately found himself still more harassed in rear than Brown had been in front.

This new British force in Boyd's rear was only a thousand strong; but, as it included every human element engaged in the defence of Canada, it has a quite peculiar interest of its own. Afloat, it included bluejackets of the Royal Navy, men of the Provincial Marine, French-Canadian voyageurs, and Anglo-Canadian boatmen from the trading-posts, all under a first-rate fighting seaman, Captain Mulcaster, R.N. Ashore, under a good regimental leader, Colonel Morrison—whose chief staff officer was Harvey, of Stoney Creek renown—it included Imperial regulars, Canadian regulars of both races, French-Canadian and Anglo-Canadian militiamen, and a party of Indians.

Early on the 11th Brown had arrived at Cornwall with his two thousand Americans; Wilkinson was starting down from Williamsburg in boats with three thousand more, and Boyd was starting down ashore with eighteen hundred. But Mulcaster's vessels pressed in on Wilkinson's rear, while Morrison pressed in on Boyd's. Wilkinson then ordered Boyd to turn about and drive off Morrison, while he hurried his own men out of reach of Mulcaster, whose armed vessels could not follow down the rapids. Boyd thereupon attacked Morrison, and a stubborn fight ensued at Chrystler's Farm. The field was of the usual type: woods on one flank, water on the other, and a more or less flat clearing in the centre. Boyd tried hard to drive his wedge in between the British and the river. But Morrison foiled him in manoeuvre; and the eight hundred British stood fast against their eighteen hundred enemies all along the line. Boyd then withdrew, having lost four hundred men; and Morrison's remaining six hundred effectives slept on their hard-won ground.

Next morning the energetic Morrison resumed his pursuit. But the campaign against Montreal was already over. Wilkinson had found that Hampton had started back for Lake Champlain while the battle was in progress; so he landed at St Regis, just inside his own country, and went into winter quarters at French Mills on the Salmon river.

In December the scene of strife changed back again to the Niagara, where the American commander, McClure, decided to evacuate Fort George. At dusk on the 10th he ordered four hundred women and children to be turned out of their homes at Newark into the biting midwinter cold, and then burnt the whole settlement down to the ground. If he had intended to hold the position he might have been justified in burning Newark, under more humane conditions, because this village undoubtedly interfered with the defensive fire of Fort George. But, as he was giving up Fort George, his act was an entirely wanton deed of shame.

Meanwhile the new British general, Gordon Drummond, second in ability to Brock alone, was hurrying to the Niagara frontier. He was preceded by Colonel Murray, who took possession of Fort George on the 12th, the day McClure crossed the Niagara river. Murray at once made a plan to take the American Fort Niagara opposite; and Drummond at once approved it for immediate execution. On the night of the 18th six hundred men were landed on the American side three miles up the river. At four the next morning Murray led them down to the fort, rushing the sentries and pickets by the way with the bayonet in dead silence. He then told off two hundred men to take a bastion at the same time that he was to lead the other four hundred straight through the main gate, which he knew would soon be opened to let the reliefs pass out. Everything worked to perfection. When the reliefs came out they were immediately charged and bayoneted, as were the first astonished men off duty who ran out of their quarters to see what the matter was. A stiff hand-to-hand fight followed. But every American attempt to form was instantly broken up; and presently the whole place surrendered. Drummond, who was delighted with such an excellent beginning, took care to underline the four significant words referring to the enemy's killed and wounded—all with the bayonet. This was done in no mere vulgar spirit of bravado, still less in abominable bloody-mindedness. It was the soldierly recognition of a particularly gallant feat of arms, carried out with such conspicuously good discipline that its memory is cherished, even to the present day, by the 100th, afterwards raised again as the Royal Canadians, and now known as the Prince of Wales's Leinster regiment. A facsimile of Drummond's underlined order is one of the most highly honoured souvenirs in the officers' mess.

Not a moment was lost in following up this splendid feat of arms. The Indians drove the American militia out of Lewiston, which the advancing redcoats burnt to the ground. Fort Schlosser fell next, then Black Rock, and finally Buffalo. Each was laid in ashes. Thus, before 1813 ended, the whole American side of the Niagara was nothing but one long, bare line of blackened desolation, with the sole exception of Fort Niagara, which remained secure in British hands until the war was over.