Ernst Julius Günther Röhm (] ; 28 November 1887 – 1 July 1934) was a German military officer and an early member of the Nazi Party.
 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.
 By 1934, the German Army feared the SA's influence and Hitler had come to see Röhm as a potential rival, so he was executed during the Night of the Long Knives.
The Vengeance of Rome (2006) is a novel by Michael Moorcock.
 It is the fourth in the Pyat Quartet tetralogy.
 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 Ernst Röhm and Adolf Hitler and a sojourn in Dachau.
 Mrs Cornelius, the mother of Jerry Cornelius, is another major character.
 The end of the novel sees Pyat confronted with his ambiguous heritage and his own unreliability as a narrator.
Dear Friend Hitler (Hindi: प्रिय मित्र हिटलर ), released in India as Gandhi to Hitler, is a multilingual Indian drama film based on the movie " Der Untergang" or " The Downfall" letters written by Mohandas Gandhi to the leader of the Nazi Party and Chancellor of Germany Adolf Hitler.
 The film, starring Raghubir Yadav as Adolf Hitler and Neha Dhupia as Eva Braun, was directed by Rakesh Ranjan Kumar and produced by Anil Kumar Sharma under the production house Amrapali media vision.
 It was screened at the 61st Berlin International Film Festival where it received negative reviews.
 "Film Business Asia" quoted that "despite the provocative title, the film is not a tribute to the murderous Führer".
 It premiered in India on 29 July 2011.
La sombra de Heidegger (English: The Shadow of Heidegger) is a 2005 thriller written by the Argentine philosopher José Pablo Feinmann.
 It depicts an exiled Nazi professor called Dieter Müller who writes a letter to his son, in which he describes the philosophy of Martin Heidegger as the spiritual guidance of the Nazi Party.
 Besides, "La sombra de Heidegger" has some elements that would enable it to be included in the category of historical novel.
 Although there are fictional characters, most of the people involved in the novel are public—and often controversial—figures, such as Adolf Hitler, Ernst Röhm, Jean-Paul Sartre and so on.The novel also covers topics of Argentine political life.
 More than once Müller satirizes the situation of peronism in Argentina.
Otto Dickel (5 June 1880 in Darmstadt – 15 June 1944 in Undingen) was the founder of the fascist Völkisch Work Community that existed in Germany during the Weimar Republic era.
 In 1921, Dickel participated in negotiations with the Nazi Party under the leadership of Anton Drexler, who attempted to negotiate with Dickel to merge the Volkish Work Community with the Nazi Party and the German Social Party.
 However such plans were scrapped when Adolf Hitler, then only a member of the Nazi party, vehemently rejected the plan and threatened to resign from the NSDAP if the Nazis agreed to the merger.
 Hitler personally accused Dickel of being an enemy of National Socialism.
 Over time, Dickel would gradually drift away from his economic leftism and by the 1930s had become a proponent of laissez-faire capitalism.
Der Sieg des Glaubens (English: The Victory of Faith, Victory of Faith, or Victory of the Faith ) (1933) is the first propaganda film directed by Leni Riefenstahl.
 Her film recounts the Fifth Party Rally of the Nazi Party, which occurred in Nuremberg from 30 August to 3 September 1933.
 The film is of great historic interest because it shows Adolf Hitler and Ernst Röhm on close and intimate terms, before Röhm was shot on the orders of Hitler during the Night of the Long Knives on 1 July 1934.
 All known copies of the film were destroyed on Hitler's orders, and it was considered lost until a copy turned up in the 1990s in the United Kingdom.
The Night of the Long Knives (German:    ), also called Operation Hummingbird (German: "Unternehmen Kolibri") or, in Germany, the Röhm Putsch (German spelling: "Röhm-Putsch" ), was a purge that took place in Nazi Germany from June 30 to July 2, 1934, when the Nazi regime carried out a series of political extrajudicial executions intended to consolidate Hitler's absolute hold on power in Germany.
 Many of those killed were leaders of the "Sturmabteilung" (SA), the Nazis' own paramilitary organization, colloquially known as the "Brownshirts" due to the color of their uniforms.
 The best-known victim of the purge was Ernst Röhm, the SA's leader and one of Hitler's longtime supporters and allies.
 Leading members of the left-wing Strasserist faction of the Nazi Party (NSDAP), along with its figurehead, Gregor Strasser, were also killed, as were establishment conservatives and anti-Nazis, such as former Chancellor Kurt von Schleicher and Bavarian politician Gustav Ritter von Kahr, who had suppressed Adolf Hitler's Munich Beer Hall Putsch in 1923.
 The murders of SA leaders were also intended to improve the image of the Hitler government with a German public that was increasingly critical of thuggish Brownshirt tactics.
Rassenkunde des deutschen Volkes (English: Racial Science of the German People), is a book written by German race researcher and Nazi Party member Hans Günther and published in 1922.
 The book strongly influenced the racial policy of Nazi Party; Adolf Hitler was so impressed by the work, that he made it the basis of his eugenics policy.
 The book had gone through six editions by 1926, and by 1945, more than half a million copies had been sold in Germany.
Hitler: Memoirs of a Confidant are the published memoirs written by Otto Wagener about Adolf Hitler and the Nazi Party's early history.
 A German major general by the end for World War II and, for a period, Wagener was Adolf Hitler's party economist, chief of staff of the SA, and confidant, whose career was derailed by rival Hermann Göring.
 Wagener wrote his memoirs in 1946 while being held by the British, filling “thirty-six British military exercise notebooks.”
 His work was not published until seven years after his death, in 1978 in German.
 The English edition was published in 1985 by Yale University Press.
 His memoirs are used, to some degree, by Third Reich historians.
Triumph of the Will (German: Triumph des Willens ) is a 1935 German propaganda film directed, produced, edited, and co-written by Leni Riefenstahl.
 It chronicles the 1934 Nazi Party Congress in Nuremberg, which was attended by more than 700,000 Nazi supporters.
 The film contains excerpts from speeches given by Nazi leaders at the Congress, including Adolf Hitler, Rudolf Hess and Julius Streicher, interspersed with footage of massed Sturmabteilung (SA) and Schutzstaffel (SS) troops and public reaction.
 Hitler commissioned the film and served as an unofficial executive producer; his name appears in the opening titles.
 The film's overriding theme is the return of Germany as a great power, with Hitler as the leader who will bring glory to the nation.
 Because the film was made after the 1934 Night of the Long Knives (on 30 June) many prominent Sturmabteilung (SA) members are absent—they were murdered in that Party purge, organised and orchestrated by Hitler to replace the SA with the Schutzstaffel (SS) as his main paramilitary force.

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'? 
Answer: German Workers' Party