Share This Article 1. This German general’s nickname was “The Sphinx.” Rüdiger von Goltz Paul von Hindenburg Hans von Seeckt Wilhelm Groener 2. From the 790s to the 1000s Christian monks often prayed to be spared from the fury of these people. The Moors The Avars The Viking The Huns 3. This German World War One flying ace’s autobiography was titled in English: Ace of the Iron Cross Lothar von Richthofen Ernst Udet Hermann Goering Wilhelm Frankl Loading …