Complex sentence: Following the start of the War in June, Borton flew with his Squadron to France and while serving on the Western Front he is recognized as being the inventor of the slang term "archie" for anti-aircraft fire.
Split into simpler sentences: Following the start of the War in June, Borton flew with his Squadron to France. It is recognized that while serving on the Western Front, Borton invented the slang term "archie" for anti-aircraft fire.