Not reflecting--for he seems to have had the information--that the wood was only fifteen miles or so in depth, the Canadians few in number, and that a short press forward would have brought him into the open country of L'Acadie leading towards Montreal, the American General [Hampton] in two days withdrew along the border towards Châteauguay Four Corners, alleging the great drought of that year as a reason for wishing to descend by the River Châteauguay. At the Corners he rested his army for many days.
When Hampton moved to Four Corners, Lieut.-Colonel De Salaberry, with the Canadian Voltigeurs, moved in like manner westward to the region of the Châteauguay and English Rivers.
De Salaberry was now ordered by him [Sir George Prevost] on the Quixotic errand of attacking with about 200 Voltigeurs and some Indians the large camp of Hampton at Four Corners.
On the 1st of October he [De Salaberry] crept up with his force to the edge of the American camp. One of his Indians indiscreetly discharged his musket. The [American] camp was in alarm in an instant.
He...withdrew to Chateauguay... taking the precaution...to destroy and obstruct as much as possible in the path of the enemy.
Acquainting himself also with the ground over which Hampton was expected to make his way into the Province he [De Salaberry] finally stopped selected and took up the position where the battle afterwards took place.
"On August 16, 1812, it was surrendered by General Hull to the British army commanded by Gen. Isaac Brock. Detroit was reoccupied by the Americans on September 29, 1813, when the name of the fort was changed to FORT SHELBY The new name was adopted in honor of Gen. Isaac Shelby, governor of Kentucky, who raised a large body of Kentucky riflemen and marched to the relief of Detroit." [Source]
He [George Peter] was the youngest son of Robert Peter. He was born in George Town on the 28th of September, 1779. When only fifteen years old he joined the Maryland troops against the Whisky Insurrectionists (1794), but his parents sent a messenger to camp and General Washington, hearing of the matter, ordered him home.
At the beginning of the War of 1812, President Madison tendered him a brigadier-generalship, which the condition of private affairs compelled him to decline, but in 1813 he volunteered his services and commanded a battalion of "Flying Artillery."
Major Peter was one of the largest landowners and farmers in Montgomery County and carried on those farms up to the date of his death, which occurred at Montanvert, near Darnestown, June 22, 1861. He was nearly eighty-two.
[Sept. 26th.  Two white men, and Capt. John (an Indian who was with us), lost their horses. They continued about the camping ground in search of them; they saw two or three Indians exploring our encampment. They took this method, no doubt, to calculate our number. The spies returned to camp this evening, who had discovered many Indian signs in front. Five of the spies who had yesterday started with the view to go to Fort Defiance, were found on the road shot, scalped, and tomahawked by the Indians or British.
Other entries from Elias Darnell's Journal here and here.
Rear-Admiral Joshua R. Sands, U.S.N....served on board Commodore Chauncey's ship Oneida in the attack on Kingston, Lake Ontario, November, 1812; also at capture of Little York (Toronto) April 27, 1813; present and took part in capture of Fort George, Niagara River, town of Newark and its dependencies; May 27, 1813, took part in various engagements with British squadron, particularly that of September 25, when serving on board the General Pike.