Complex sentence: The objective of the operation was to drop 500 dummy parachutists in places other than the actual drop zones used, in the hope that the Germans would believe that a larger force than was actually used had landed and deploy their reinforcements away from the real landing area.
Split into simpler sentences: The objective of the operation was to drop 500 dummy parachutists, in places other than the actual drop zones used. Hoping the Germans would believe a larger force then was actually used had landed and deploy their reinforcements away from the real landing area.