 FACT: The squadron in the movie that Stachel and von Klugermann  belonged to and that Heidemann commanded was referred to as "Jasta  11". Later in the movie, after Stachel saves Manfred von  Richthofens life, Richthofen invites him to transfer to his Flying  Circus. In real life, Jasta 11 WAS Richthofens Flying Circus!