Complex sentence: D'Iberville's depleted French force captured York Factory by a ruse; they laid siege to the fort while pretending to be a much larger army, the French held all of the outposts except Fort Albany until 1713.
Split into simpler sentences: D'Iberville's depleted French force captured York Factory by laying siege to the fort and pretending to be a much larger army. The French retained all of the outposts except Fort Albany until 1713.