Lothar-Siegfried Freiherr von Richthofen (27 September 1894 – 4 July 1922) was a German First World War fighter ace credited with 40 victories. He was a younger brother of top-scoring ace Manfred von Richthofen (the Red Baron) and a distant cousin of Luftwaffe Field Marshal Wolfram von Richthofen.
William Avery "Billy" Bishop, VC, CB, DSO & Bar, MC, DFC, ED, LL.D. (8 February 1894 – 11 September 1956) was a Canadian First World War flying ace, officially credited with 72 victories, making him the top Canadian ace of the war. The successes of Bishop and his blue-nosed aircraft were noticed on the German side, and they began referring to him as "Hell's Handmaiden". Ernst Udet called him "the greatest English scouting ace" and one Jasta had a bounty on his head.