On the capture of the forts, the American frigates and galleys stationed for the protection of the chevaux-de-frise slipped their cables, made all sail, and endeavored to escape up the river. The wind, however, proved adverse; there was danger of their falling into the hands of the enemy; the crews, therefore, set them on fire and abandoned them. On the following morning, the chevaux-de-frise and other obstructions between Fort Montgomery and Anthony's Nose were cleared away: the Americans evacuated Forts Independence and Constitution, and a free passage up the Hudson was open for the British ships. Sir Henry Clinton proceeded no further in person, but left the rest of the enterprise to be accomplished by Sir James Wallace and General Vaughan, with a flying squadron of light frigates, and a considerable detachment of troops.

Putnam had retreated to a pass in the mountains, on the east side of the river, near Fishkill, having removed as much of the stores and baggage as possible from the post he had abandoned. In a letter to Washington (Oct. 8th), he writes: "Governor Clinton is exerting himself in collecting the militia of this State. Brigadier-general Parsons I have sent off to forward in the Connecticut militia, which are now arriving in great numbers. I therefore hope and trust, that in the course of a few days, I shall be able to oppose the progress of the enemy."

He had concerted with Governor Clinton that they should move to the northward with their forces along the opposite shores of the Hudson, endeavoring to keep pace with the enemy's ships and cover the country from their attacks. The enemy's light-armed vessels were now making their way up the river; landing marauding parties occasionally to make depredations.

As soon as the governor could collect a little force, he pressed forward to protect Kingston (Esopus), the seat of the State Legislature. The enemy in the meantime landed from their ships, routed about one hundred and fifty militia collected to oppose them, marched to the village, set fire to it in every part, consuming great quantities of stores collected there, and then retreated to their ships. Having laid Kingston in ashes, the enemy proceeded in their ravages, destroying the residences of conspicuous patriots at Rhinebeck, Livingston, Manor, and elsewhere, and among others the mansion of the widow of the brave General Montgomery—trusting to close their desolating career by a triumphant junction with Burgoyne at Albany.

While Sir Henry Clinton had been thundering in the Highlands, Burgoyne and his army had been wearing out hope within their intrenchments, vigilantly watched but unassailed by the Americans. On the 7th of October Burgoyne determined to make a grand movement on the left of the American camp, to discover whether he could force a passage should it be necessary to advance, or dislodge it from its position should he have to retreat. Another object was to cover a forage of the army which was suffering from the great scarcity. For this purpose fifteen hundred of his best troops, with two twelve-pounders, two howitzers and six six-pounders, were to be led by himself, seconded by Major-generals Phillips and Riedesel and Brigadier-general Fraser. On leaving his camp he committed the guard of it on the high grounds to Brigadier-generals Hamilton and Specht, and of the redoubts on the low grounds near the river, to Brigadier-general Gall.

Forming his troops within three-quarters of a mile of the left of the Americans, though covered from their sight by the forest, he sent out a corps of rangers, provincials and Indians to skulk through the woods, get in their rear, and give them an alarm at the time the attack took place in front. The movement, though carried on behind the screen of forests, was discovered. In the afternoon the advanced guard of the American centre beat to arms; the alarm was repeated throughout the line. Gates ordered his officers to their alarm posts, and sent forth Wilkinson, the adjutant-general, to inquire the cause. From a rising ground in an open place he descried the enemy in force. Returning to the camp he reported the position and movements of the enemy; that their front was open, their flanks rested on woods, under cover of which they might be attacked, and their right was skirted by a height; that they were reconnoitring the left, and he thought offered battle.

A plan of attack was soon arranged. Morgan with his riflemen and a body of infantry was sent to make a circuit through the woods and get possession of the heights on the right of the enemy, while General Poor with his brigade of New York and New Hampshire troops, and a part of Leonard's brigade, were to advance against the enemy's left. Morgan was to make an attack on the heights as soon as he should hear the fire opened below.

Burgoyne now drew out his troops in battle array. The grenadiers, under Major Ackland, with the artillery, under Major Williams, formed his left, and were stationed on a rising ground, with a rivulet called Mill Creek in front. Next to them were the Hessians, under Riedesel, and British, under Phillips, forming the centre. The light-infantry, under Lord Balcarras, formed the extreme right; having in the advance a detachment of five hundred picked men, under General Fraser, ready to flank the Americans as soon as they should be attacked in front.

He had scarce made these arrangements, when he was astonished and confounded by a thundering of artillery on his left, and a rattling fire of rifles on the woody heights on his right. The troops under Poor advanced steadily up the ascent where Ackland's grenadiers and Williams' artillery were stationed; received their fire and then rushed forward. Ackland's grenadiers received the first brunt, but it extended along the line as detachment after detachment arrived, and was carried on with inconceivable fury. The artillery was repeatedly taken and retaken, and at length remained in possession of the Americans, who turned it upon its former owners. Major Ackland was wounded in both legs, and taken prisoner. Major Williams of the artillery was also captured. The headlong impetuosity of the attack confounded the regular tacticians. Much of this has been ascribed to the presence and example of Arnold. That daring officer, who had lingered in the camp in expectation of a fight, was exasperated at having no command assigned him. On hearing the din of battle, he could restrain no longer his warlike impulse, but threw himself on his horse and sallied forth. Putting spurs to his horse, he dashed into the scene of action, and was received with acclamation. Being the superior officer in the field his orders were obeyed of course. Putting himself at the head of the troops of Learned's brigade, he attacked the Hessians in the enemy's centre, and broke them with repeated charges. Indeed, for a time his actions seemed to partake of frenzy; riding hither and thither, brandishing his sword, and cheering on the men to acts of desperation.

Morgan, in the meantime, was harassing the enemy's right wing with an incessant fire of small-arms, and preventing it from sending any assistance to the centre. General Fraser with his chosen corps, for some time rendered great protection to this wing. Mounted on an iron-gray charger, his uniform of a field officer made him a conspicuous object for Morgan's sharpshooters. One bullet cut the crupper of his horse, another grazed his mane. A moment afterwards he was shot down by a marksman posted in a tree. Two grenadiers bore him to the camp. His fall was as a deathblow to his corps. The arrival on the field of a large reinforcement of New York troops under General Ten Broeck, completed the confusion. Burgoyne saw that the field was lost, and now only thought of saving his camp. The troops nearest to the lines were ordered to throw themselves within them, while Generals Phillips and Riedesel covered the retreat of the main body, which was in danger of being cut off. The artillery was abandoned, all the horses, and most of the men who had so bravely defended it having been killed. The troops, though hard pressed, retired in good order. Scarcely had they entered the camp when it was stormed with great fury; the Americans, with Arnold at their head, rushing to the lines under a severe discharge of grape-shot and small-arms. Lord Balcarras defended the intrenchments bravely; the action was fierce, and well sustained on both sides. After an ineffectual attempt to make his way into the camp in this quarter at the point of the bayonet, Arnold spurred his horse toward the right flank of the camp occupied by the German reserve, where Lieutenant-colonel Brooks was making a general attack with a Massachusetts regiment. Here, with a part of a platoon, he forced his way into a sallyport, but a shot from the retreating Hessians killed his horse, and wounded him in the same leg which had received a wound before Quebec. He was borne off from the field, but not until the victory was complete; for the Germans retreated from the works, leaving on the field their brave defender, Lieutenant-colonel Breyman, mortally wounded.