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"): As one of the members of its predecessor, the German Workers' Party, he was a close friend and early ally of Adolf Hitler and a co-founder of the "Sturmabteilung " (SA, "Storm Battalion"), the Nazi Party's militia, and later was its commander.
Relevant evidence: Yes