Complex sentence: On the drop zone the pathfinders and Royal Engineers of the 2nd Parachute Squadron were removing obstacles, preparing for the arrival of their gliders later in the day, while the under strength parachute battalions headed for their objectives.
Split into simpler sentences: On the drop zone the pathfinders and Royal Engineers of the 2nd Parachute Squadron were removing obstacles preparing for the arrival of their gliders later in the day. While the under strength parachute battalions headed for their objectives.