Complex sentence: Another Auster squadron, No.661 Squadron, moved into Penshurst the day 653 Squadron left, like 653 Squadron, 661 followed them to France on 7 August 1944.
Split into simpler sentences: Another Auster squadron, No.661 Squadron, moved into Penshurst the day 653 Squadron left. Like 653 Squadron, 661 followed them to France on 7 August 1944.