Polish Operation of the NKVDThe Polish Operation of the NKVD (Soviet security service) in 1937–1938 was an anti-Polish mass-ethnic cleansing operation of the NKVD carried out in the Soviet Union against Poles (labeled by the Soviets as "agents") during the period of the Great Purge. It was ordered by the Politburo of the Communist Party against so-called "Polish spies" and customarily interpreted by NKVD officials as relating to 'absolutely all Poles'. It resulted in the sentencing of 139,835 people, and summary executions of 111,091 Poles living in or near the Soviet Union.
AbwehrThe Abwehr (German for resistance or defence, though the word usually means counterintelligence in a military context; ˈapveːɐ̯) was the German military-intelligence service for the Reichswehr and the Wehrmacht from 1920 to 1945. 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.
Butovo firing rangeThe Butovo Firing Range or Butovo Shooting Range (Бутовский полигон) was an execution site of the Soviet secret police located near Drozhzhino in Leninsky District, Moscow Oblast from 1938 to 1953. Its use for mass execution has been documented; it was prepared as a site for mass burial. As the late Arseny Roginsky explained: "firing range" was a popular euphemism adopted to describe the mysterious and closely-guarded plots of land that the NKVD began to set aside for mass burials on the eve of the Great Terror.
KGBThe Committee for State Security (CSS) (Komitet gosudarstvennoy bezopasnosti (KGB), kəmjɪˈtjet ɡəsʊˈdarstvjɪn(ː)əj bjɪzɐˈpasnəsjtjɪ) was the main security agency for the Soviet Union from 13 March 1954 until 3 December 1991. As a direct successor of preceding agencies such as the Cheka, GPU, OGPU, NKGB, NKVD and MGB, it was attached to the Council of Ministers. It was the chief government agency of "union-republican jurisdiction", carrying out internal security, foreign intelligence, counter-intelligence and secret police functions.
Guerrilla war in the Baltic statesThe guerrilla war in the Baltic states was an insurgency waged by Baltic (Latvian, Lithuanian and Estonian) partisans against the Soviet Union from 1944 to 1956. Known alternatively as the "Forest Brothers", the "Brothers of the Wood" and the "Forest Friars" (metsavennad, mežabrāļi, žaliukai), these partisans fought against invading Soviet forces during their occupation of the Baltic states during and after World War II. Similar insurgent groups resisted Soviet occupations in Bulgaria, Poland, Romania and Ukraine.
Internal TroopsInternal troops, sometimes alternatively translated as interior troops, interior ministry forces (etc.), are military or paramilitary, gendarmerie-like law enforcement services, which are found mostly in states of the former Soviet Union, primarily Russia. Internal troops are subordinated to the interior minister (and interior ministries) of their respective countries. Perhaps the most prominent example, since the Soviet era have been the Russian Внутренние войска Министерства внутренних дел (ВВ) Vnutrenniye Voiska (VV) Ministerstva Vnutrennikh Del, or "Internal Troops of the Ministry for Internal Affairs" (MVD) (until 2016).
SMERSHSMERSH (СМЕРШ) was an umbrella organization for three independent counter-intelligence agencies in the Red Army formed in late 1942 or even earlier, but officially announced only on 14 April 1943. The name SMERSH was coined by Joseph Stalin. The formal justification for its creation was to subvert the attempts by Nazi German forces to infiltrate the Red Army on the Eastern Front.
Joint State Political DirectorateThe Joint State Political Directorate (JSPD) (OGPU; Объединённое государственное политическое управление) was the intelligence and state security service and secret police of the Soviet Union from 1923 to 1934. The OGPU was formed from the State Political Directorate of the Russian Soviet Federative Socialist Republic one year after the founding of the Soviet Union and responsible to the Council of People's Commissars.
MI6The Secret Intelligence Service (SIS), commonly known as MI6 (Military Intelligence, Section 6), is the foreign intelligence service of the United Kingdom, tasked mainly with the covert overseas collection and analysis of human intelligence in support of the UK's national security. SIS is one of the British intelligence agencies and the Chief of the Secret Intelligence Service ("C") is directly accountable to the Foreign Secretary.
Central Committee of the Communist Party of the Soviet UnionThe Central Committee of the Communist Party of the Soviet Union was the executive leadership of the Communist Party of the Soviet Union, acting between sessions of Congress. According to party statutes, the committee directed all party and governmental activities. Its members were elected by the Party Congress. During Vladimir Lenin's leadership of the Communist Party, the Central Committee functioned as the highest party authority between Congresses.
