The July 9th Formation

Hull's Army In Detroit:

Source

The advance column reached a point parallel to the lower end of the island (then called Hog Island or Isle Descochon), the columns wheeled by the right into line, by which movement the Third Regiment volunteers became the right of the army.  It was now daylight bf a delightful bright summer morning. The whole line entered bateaux, which had on the preceding evening been taken from opposite the fort, down the river, to a point opposite Sandwich, in order to mislead the enemy as to the place selected for our advance, and had been brought back to this point after 12 o'clock.