Question: The Vengeance of Rome (2006) is a novel by Michael Moorcock, in this novel, Colonel Pyat, an incarnation of the Eternal Champion, goes to Italy and Germany, where he becomes involved in Fascism and Naziism, including sexual encounters with which German military officer and an early member of the Nazi Party?
Answer: 
Ernst Julius Günther Röhm
Ernst Julius Günther Röhm