Heinrich Himmler in the context of "Gestapo–NKVD conferences"

Ernst Kaltenbrunner (4 October 1903 – 16 October 1946) was an Austrian high-ranking SS official during the Nazi era, major perpetrator of the Holocaust and convicted war criminal. After the assassination of Reinhard Heydrich in 1942, and a brief period under Heinrich Himmler, Kaltenbrunner was the third Chief of the Reich Security Main Office (RSHA), which included the offices of Gestapo, Kripo and SD, from January 1943 until the end of World War II in Europe.

Kaltenbrunner joined the Nazi Party in 1930 and the SS in 1931, and by 1935 he was considered a leader of the Austrian SS. In 1938, he assisted in the Anschluss and was given command of the SS and police force in Austria. In January 1943, Kaltenbrunner was appointed chief of the RSHA, succeeding Reinhard Heydrich, who was assassinated in May 1942.

The Waffen-SS (German: [ˈvafn̩ʔɛsˌʔɛs]; lit. 'Armed SS') was the combat branch of the Nazi Party's paramilitary Schutzstaffel (SS) organisation. Its formations included men from Nazi Germany, along with volunteers and conscripts from both German-occupied Europe and unoccupied lands. With the start of World War II, tactical control was exercised by the Oberkommando der Wehrmacht (OKW, "High Command of the Armed Forces"), with some units being subordinated to the Kommandostab Reichsführer-SS (lit. 'Command Staff Reich Leader-SS') directly under Reichsführer-SS Heinrich Himmler's control. It was disbanded in May 1945.

The Waffen-SS grew from three regiments to over 38 divisions during World War II. Combining combat and police functions, it served alongside the German Army (Heer), Ordnungspolizei (Order Police), and other security units. Originally, it was under the control of the SS Führungshauptamt (SS operational command office) beneath Himmler.

Hermann Wilhelm Göring (or Goering; German: [ˈhɛʁman ˈvɪlhɛlm ˈɡøːʁɪŋ] ; 12 January 1893 – 15 October 1946) was a German Nazi politician, aviator, military leader, and convicted war criminal. He was one of the most powerful figures in the Nazi Party, which controlled Germany from 1933 to 1945. He also served as Oberbefehlshaber der Luftwaffe (Supreme Commander of the Air Force), a position he held until the final days of the regime.

He was born in Rosenheim, Bavaria. A veteran World War I fighter pilot ace, Göring was a recipient of the Pour le Mérite. He served as the last commander of Jagdgeschwader 1 (JG I), the fighter wing once led by Manfred von Richthofen. An early member of the Nazi Party, Göring was among those wounded in Adolf Hitler's failed Beer Hall Putsch in 1923. While receiving treatment for his injuries, he developed an addiction to morphine that persisted until the last year of his life. After Hitler became Chancellor of Germany in 1933, Göring was named as minister without portfolio in the new government. One of his first acts as a cabinet minister was to oversee the creation of the Gestapo, which he ceded to Heinrich Himmler in 1934.

Einsatzgruppen (German: [ˈaɪnzatsˌɡʁʊpm̩], lit. 'deployment groups'; also 'task forces') were Schutzstaffel (SS) paramilitary death squads of Nazi Germany that were responsible for mass murder, primarily by shooting, during World War II (1939–1945) in German-occupied Europe. The Einsatzgruppen had an integral role in the implementation of the so-called "Final Solution to the Jewish question" (Die Endlösung der Judenfrage) in territories conquered by Nazi Germany, and were involved in the murder of much of the intelligentsia and cultural elite of Poland, including members of the Catholic priesthood. Almost all of the people they murdered were civilians, beginning with the intelligentsia and swiftly progressing to Soviet political commissars, Jews, and Romani people, as well as actual or alleged partisans throughout Eastern Europe.

Under the direction of Reichsführer-SS Heinrich Himmler and the supervision of SS-Obergruppenführer Reinhard Heydrich, the Einsatzgruppen operated in territories occupied by the Wehrmacht (German armed forces) following the invasion of Poland in September 1939 and the invasion of the Soviet Union in June 1941. The Einsatzgruppen worked hand-in-hand with the Order Police battalions on the Eastern Front to carry out operations ranging from the murder of a few people to operations which lasted over two or more days, such as the massacre at Babi Yar (with 33,771 Jews murdered in two days), and the Rumbula massacre (with about 25,000 Jews murdered in two days of shooting). As ordered by Nazi leader Adolf Hitler, the Wehrmacht cooperated with the Einsatzgruppen, providing logistical support for their operations, and participated in the mass murders. Historian Raul Hilberg estimates that between 1941 and 1945 the Einsatzgruppen, related agencies, and foreign auxiliary personnel murdered more than two million people, including 1.3 million of the 5.5 to 6 million Jews murdered during the Holocaust.

The Schutzstaffel (German: [ˈʃʊtsˌʃtafl̩] ; lit. 'Protection Squadron'; SS; also stylised with SS runes as ᛋᛋ) was a major paramilitary organisation under Adolf Hitler and the Nazi Party in Nazi Germany, and later throughout German-occupied Europe during World War II.

It began with a small guard unit known as the Saal-Schutz ("Hall Security") made up of party volunteers to provide security for party meetings in Munich. In 1925, Heinrich Himmler joined the unit, which had by then been reformed and given its final name. Under his direction (1929–1945) it grew from a small paramilitary formation during the Weimar Republic to one of the most powerful organisations in Nazi Germany. From the time of the Nazi Party's rise to power until the regime's collapse in 1945, the SS was the foremost agency of security, mass surveillance, and state terrorism within Germany and German-occupied Europe.

The Reich Security Main Office (German: Reichssicherheitshauptamt pronounced [ˈʁaɪ̯çsˌzɪçɐhaɪ̯t͡sˌhaʊ̯ptʔamt] , RSHA) was an organization under Heinrich Himmler in his dual capacity as Chef der Deutschen Polizei (Chief of German Police) and Reichsführer-SS, the head of the Nazi Party's Schutzstaffel (SS). The organization's stated duty was to fight all "enemies of the Reich" inside and outside the borders of Nazi Germany. From its very inception, the RSHA was a central institution for the Nazis, playing a pivotal role in orchestrating and executing the Holocaust.

The Geheime Staatspolizei ([ɡəˈhaɪmə ˈʃtaːtspoliˌtsaɪ] , lit. 'Secret State Police'), abbreviated Gestapo ([ɡəˈstaːpo] ), was the official secret police of Nazi Germany and in German-occupied Europe.

The force was created by Hermann Göring in 1933 by combining the various political police agencies of Prussia into one organisation. On 20 April 1934, oversight of the Gestapo passed to the head of the Schutzstaffel (SS), Heinrich Himmler, who was also appointed Chief of German Police by Hitler in 1936. Instead of being exclusively a Prussian state agency, the Gestapo became a national one as a sub-office of the Sicherheitspolizei (SiPo; Security Police). From 27 September 1939, it was administered by the Reich Security Main Office (RSHA). It became known as Amt (Dept) 4 of the RSHA and was considered a sister organisation to the Sicherheitsdienst (SD; Security Service).

The 11th SS Panzer Army (SS-Panzer-Armeeoberkommando 11) was little more than a paper army formed in February 1945 by Heinrich Himmler while he was commander of Army Group Vistula. (The army was officially listed as the 11th Army but it was also known as SS Panzer-Armeeoberkommando 11 and is often referred to in English sources as the 11th SS Panzer Army.)

Military historian Antony Beevor writes that when the 11th SS Panzer Army was created the available units at best could constitute a corps, but 'panzer army', observed Hans-Georg Eismann, 'has a better ring to it'. It also allowed Himmler to promote SS officers to senior staff and field commands within the formation. Obergruppenführer Felix Steiner was named its commander.