Complex sentence: The French force won in the naval battle with three English warships and again captured the fort-D'Iberville had laid siege to the fort in such a way as to give the appearance of having a much stronger force.
Split into simpler sentences: The French force won in the naval battle with three English warships and again captured the fort. D'Iberville laid siege to the fort in a way that gave the appearance of being a much stronger force.