His younger brother probably would have surpassed him if the war had gone on longer.
There are many 'What ifs' from the first world war.
What if Mick Mannock had claimed all of his kills? What if he hadn't shared kills with his flight? What if Albert Ball wasn't killed? What if Voss hadn't been gang banged by 56 Squadron? What if Boelcke hadn't been killed by a ace pilot?
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Von Richtofen was a cold hearted hunter, both in an aeroplane and when on the ground. From what i have read, the only close relationship he had was with his dog. He was outstanding at killing 2 seaters and aircraft on the fringes of the fight. Brown shot him down (or not as the case may be) in such a situation. He brought down sixteen B.E.2's, thirteen F.E.2's, eight Sopwith Camels, seven R.E.8's, five Bristol fighters, five Spad VII's, five Nieuports, and fewer numbers of nine other types. He was a great squadron leader like McCudden, Mannock or Goering. He did not have the sublime skill in a dogfight such as Voss or Ball.
-S- to the most famous aviator ever to have lived.