Complex sentence: The landing took place on the night of the 12th-13th, a French speaking officer fooled the sentry guarding the track, and by morning ten battalions of British troops had formed up on the Plains of Abraham.
Split into simpler sentences: The landing took place on the night of the 12th-13th. A French-speaking officer fooled the sentry guarding the track, and by morning ten battalions of British troops had formed up on the Plains of Abraham.