Question: What is the name of the predecessor to the Nazi Party which included Ernst Julius Günther Röhm as a member, a close friend and early ally of Adolf Hitler and whose sexual encounters are written about in the novel 'The Vengeance of Rome'? 
Sentence (from "Ernst Röhm"): Ernst Julius Günther Röhm (] ; 28 November 1887 – 1 July 1934) was a German military officer and an early member of the Nazi Party.
Relevant evidence: Yes