Complex sentence: Using two landing zones, one to the west of the Caen canal and the other to the east of the River Orne, Mallard was the third airborne operation involving units of the division on D-Day.
Split into simpler sentences: Using two landing zones, one to the west of the Caen canal and the other to the east of the River Orne. It was the third airborne operation involving units of the division on D-Day.