Nazi German intelligence agencies

The '''' (; German for "resistance" or "defence", though the word usually means "counterintelligence" in a military context) was the German military-intelligence service for the Reichswehr and the Wehrmacht from 1920 to 1944. Although the 1919 Treaty of Versailles prohibited the Weimar Republic from establishing an intelligence organization of their own, they formed an espionage group in 1920 within the Ministry of Defence, calling it the Abwehr. The initial purpose of the Abwehr was defense against foreign espionage: an organizational role that later evolved considerably. Under General Kurt v

''''' (, "Security Service"), full title ''' ("Security Service of the Reichsführer-SS"), or SD, was the intelligence agency of the SS and the Nazi Party in Nazi Germany. Established in 1931, the SD was the first Nazi intelligence organization and the Gestapo (formed in 1933) was considered its sister organization through the integration of SS members and operational procedures. The SD was administered as an independent SS office between 1933 and 1939. That year, the SD was transferred over to the Reich Security Main Office (Reichssicherheitshauptamt''; RSHA), as one of its seven departments.

The ' often abbreviated as SiPo', is a German term meaning "security police". In the Nazi era, it referred to the state political and criminal investigation security agencies. It was made up by the combined forces of the Gestapo (secret state police) and the Kriminalpolizei (criminal police; Kripo) between 1936 and 1939. As a formal agency, the SiPo was incorporated into the Reich Security Main Office (RSHA) in 1939, but the term continued to be used informally until the end of World War II in Europe.

Nazi German military intelligence organization