Complex sentence: Although overshadowed by the Supermarine Spitfire, the aircraft became renowned during the Battle of Britain, accounting for 60 percent of the RAF air victories in the battle, and served in all the major theatres of the Second World War.
Split into simpler sentences: Although overshadowed by the Supermarine Spitfire, the aircraft became renowned during the Battle of Britain, accounting for 60 percent of the RAF air victories in the battle. It served in all the major theatres of the Second World War.