Question: What is the name of this series of mass executions during World War II, which, along with Sambor Ghetto, was anenexed to the Ukranian SSR?

full_context: Document 1: NKVD prisoner massacres: The NKVD prisoner massacres were a series of mass executions carried out by the Soviet NKVD secret police during World War II against political prisoners across Eastern Europe, primarily Poland, Ukraine, the Baltic states, Bessarabia and other parts of the Soviet Union from which the Red Army was retreating following the Nazi German attack on the Soviet positions in occupied Poland, known as Operation Barbarossa.
Document 2: List of victims of the Babi Yar massacre: This is a list of victims of the Babi Yar massacre. During September 29—30, 1941, a special team of German SS aided by Ukrainian police killed 33,771 Jews. Subsequent massacres also included Ukrainians and Poles. The Babi Yar massacre is considered to be "the largest single massacre in the history of the Holocaust". Executions of Jews, Ukrainians, Gypsies and others continued in Babi Yar throughout the period of the Nazi occupation of Kiev, ending with the beginning of the Battle of Kiev (1943), totalling up to 120,000 victims.
Document 3: Częstochowa Ghetto: The Częstochowa Ghetto was a World War II ghetto set up by Nazi Germany for the purpose of persecution and exploitation of local Jews in the city of Częstochowa during the German occupation of Poland. The approximate number of people confined to the ghetto was around 40,000 at the beginning and in late 1942 at its peak – right before mass deportations – 48,000. Most ghetto inmates were delivered by the Holocaust trains to their deaths at the Treblinka extermination camp. In June 1943, the remaining ghetto inhabitants launched the Częstochowa Ghetto uprising, which was extinguished by the "SS" after a few days of fighting.
Document 4: Ethnic cleansing of Zamojszczyzna by Nazi Germany: The ethnic cleansing of Zamojszczyzna by Nazi Germany (German: "Aktion Zamosc" , also: "Operation Himmlerstadt") during World War II was carried out as part of a greater plan of forcible removal of the entire Polish populations from targeted regions of occupied Poland in preparation for the state-sponsored settlement of the ethnic German "Volksdeutsche". The operation of mass expulsions from Zamojszczyzna region around the city of Zamość (now in Lublin Voivodeship, Poland) was carried out between November 1942 and March 1943 on direct order from Heinrich Himmler. It was preplanned by both, Globocnik from Action Reinhard and Himmler, as the first stage of the eventual murderous ethnic cleansing ahead of projected Germanization of the entire General Government territory.
Document 5: Sobibór extermination camp: Sobibór (or Sobibor , or , ] ) was a Nazi German extermination camp built and operated by the SS near the railway station of Sobibór during World War II, within the semi-colonial territory of General Government of the occupied Second Polish Republic. The camp was part of the secretive Operation Reinhard, which marked the deadliest phase of the Holocaust in German-occupied Poland. The camp was situated near the rural county's major town of Włodawa (called "Wolzek" by the Germans), 85 km south of the provincial capital, Brest-on-the-Bug (Brześć nad Bugiem in Polish). Its official German name was "SS-Sonderkommando Sobibór". Jews from Poland, France, Germany, the Netherlands, Czechoslovakia and the Soviet Union (including Jewish-Soviet POWs), were transported to Sobibór by rail. Most were suffocated in gas chambers fed by the exhaust of a large petrol engine. Up to 200,000 people were murdered at Sobibór and possibly more. At the postwar trial against the former "SS" personnel of Sobibór, held in Hagen two decades into the Cold War, Professor Wolfgang Scheffler estimated the number of murdered Jews totalled a minimum of 250,000. This would make it the fourth worst extermination camp, after Bełżec, Treblinka, and Auschwitz.
Document 6: Białystok Ghetto: The Białystok Ghetto (Polish: "getto w Białymstoku" ) was a World War II Jewish ghetto set up by Nazi Germany between July 26 and early August 1941 in the newly formed "Bezirk Bialystok" district of the Third Reich within Nazi occupied Poland. About 50,000 Jews from the vicinity of Białystok and the surrounding region were herded into a small area of the city, which was turned into the "Bezirk's" capital. The ghetto was split in two by the Biała River running through it "(see map)". Most inmates were put to work in the forced-labor enterprises for the German war effort, primarily in large textile, shoe and chemical companies operating inside and outside its boundaries. The ghetto was liquidated in November 1943 after the Białystok Ghetto uprising was crushed. All its inhabitants were either killed locally, or transported in Holocaust trains to the Majdanek and Treblinka extermination camps.
Document 7: Łuck Ghetto: The Łuck Ghetto (a.k.a. the Lutsk Ghetto, Polish: "getto w Łucku" , German: "Ghetto Luzk" ) was a Jewish World War II ghetto established in 1941 by the "Schutzstaffel" ("SS") in the prewar Polish city of Łuck (now Lutsk, Ukraine) occupied by Germany after Operation Barbarossa, in the south-eastern region of Kresy. Łuck was the capital of the Wołyń Voivodeship (1921–39) in the Second Polish Republic before the joint Nazi-Soviet invasion of Poland of 1939. The invading Soviets annexed the city to the Ukrainian SSR in 1939 along with the entire region, an renamed it as Луцьк (Lutsk).
Document 8: Massacres in Piaśnica: The massacres in Piaśnica were a set of mass executions carried out by Nazi Germany during World War II, between the fall of 1939 and spring of 1940 in Piaśnica Wielka (Groß Piasnitz) in the Darzlubska Wilderness near Wejherowo. The exact number of people murdered is unknown, but estimates range between 12,000 and 14,000 victims. Most of them were Polish intellectuals from Gdańsk Pomerania, but Poles, Jews, Czechs and German inmates from mental hospitals from General Government and the Third Reich were also murdered. After the Stutthof concentration camp, Piaśnica was the largest site of killings of Polish civilians in Pomerania by the Germans, and for this reason is sometimes referred to as the "second" or "Pomeranian" Katyn. It was the first large scale Nazi atrocity in occupied Poland.
Document 9: Gestapo–NKVD conferences: The Gestapo–NKVD conferences were a series of security police meetings organized in late 1939 and early 1940 by Germany and the Soviet Union, following their joint invasion of Poland in accordance with the Molotov-Ribbentrop Pact. The meetings enabled both parties to pursue specific goals and aims as outlined independently by Hitler and Stalin, with regard to the acquired, formerly Polish territories. The conferences were held by the Gestapo and the NKVD officials in several Polish cities. In spite of their differences on other issues, both Heinrich Himmler and Lavrentiy Beria had similar objectives as far as the fate of the prewar Poland was concerned.
Document 10: Great Purge: The Great Purge or the Great Terror (Russian: Большо́й терро́р ) was a campaign of political repression in the Soviet Union which occurred from 1936 to 1938. It involved a large-scale purge of the Communist Party and government officials, repression of peasants and the Red Army leadership, widespread police surveillance, suspicion of "saboteurs", "counter-revolutionaries", imprisonment, and arbitrary executions. Mobile gas vans were invented to execute people without trial. In Russian historiography, the period of the most intense purge, 1937–1938, is called Yezhovshchina (Russian: Ежовщина ; literally, "Yezhov phenomenon", commonly translated as "times of Yezhov" or "doings of Yezhov"), after Nikolai Yezhov, the head of the Soviet secret police, the NKVD, who was later killed in the purge. It has been estimated that 600,000 people died at the hands of the Soviet government during the Purge.
Document 11: Kraków Ghetto: The Kraków Ghetto was one of five major, metropolitan Jewish ghettos created by Nazi Germany in the new General Government territory during the German occupation of Poland in World War II. It was established for the purpose of exploitation, terror, and persecution of local Polish Jews, as well as the staging area for separating the "able workers" from those who would later be deemed unworthy of life. The Ghetto was liquidated between June 1942 and March 1943, with most of its inhabitants sent to their deaths at Bełżec extermination camp as well as Płaszów slave-labor camp, and Auschwitz concentration camp, 60 km rail distance.
Document 12: Kresy: Kresy Wschodnie or Kresy (] , Eastern Borderlands, or Borderlands) was a region of the Second Polish Republic during the interwar period constituting nearly half of the territory of the state; where the ethnic Poles, being the largest group, were roughly equal in their number to the size of the national minorities (with notable exceptions). Administratively, the territory of Kresy was composed of voivodeships of Lwów, Nowogródek, Polesie, Stanisławów, Tarnopol, Wilno, Wołyń, and the Białystok. Today, these territories are divided between Western Ukraine, Western Belarus, and south-eastern Lithuania, with such major cities as Lviv, Vilnius, and Grodno no longer in Poland. In the Second Polish Republic the term "Kresy" roughly equated with the lands beyond the so-called Curzon Line, which was suggested after World War I in December 1919 by the British Foreign Office as the eastern border of the re-emerging sovereign Republic following the century of partitions. In September 1939, after the Soviet Union joined Nazi Germany in their attack on Poland in accordance with the Molotov–Ribbentrop Pact, the territories were incorporated into Soviet Ukraine, Belarus and Lithuania in the atmosphere of terror.
Document 13: Nikolaev massacre: The Nikolaev Massacre was a massacre which resulted in the deaths of 35,782 Soviet citizens, most of whom were Jews, during World War II, on September 16–30, 1941. It took place in and around the city of Mykolaiv (also known as Nikolaev) and the neighboring city of Kherson in (current) southern Ukraine (then USSR). The massacre was carried out by German troops of Einsatzgruppe D under the command of Otto Ohlendorf, who was later convicted at the Einsatzgruppen trial of the Nuremberg Trials and was sentenced to death by hanging. The killings were committed by many of the same troops who carried out the massacre at Babi Yar, and the victims were counted and described in an Einsatzgruppen document dated October 2, 1941 as "Jews and Communists". This document was entered into evidence at the Nuremberg Trials as NO-3137.
Document 14: Sambor Ghetto: Sambor Ghetto (Polish: "getto w Samborze" ) was a Jewish World War II ghetto established in March 1942 by the "Schutzstaffel" ("SS") in the prewar Polish city of Sambor in the south-eastern region of Kresy (now Sambir, Ukraine). Sambor was occupied by Nazi Germany twice, first during the joint German-Soviet invasion of Poland in 1939, and again, after the 1941 Operation Barbarossa. Before the war, Sambor was a county seat in the Lwów Voivodeship of the Second Polish Republic. The invading Germans handed the town over to the Soviets in accordance with the Nazi-Soviet Pact against Poland. Sambor was annexed to the Ukrainian SSR along with the entire region in the atmosphere of intimidation, and the NKVD terror. In 1941 the city was overrun again by the Wehrmacht army in the course of the German attack on the Soviet positions behind the Curzon Line (see map, marked in red), and incorporated it into their own "Distrikt Galizien". According to the Polish census of 1931 Jews constituted nearly 29 percent of the town's inhabitants, most of whom were killed during the Holocaust. Sambor (Sambir) is not to be confused with the much smaller Old Sambor (Stary Sambor, now Staryi Sambir) located close-by, although their Jewish history is inextricably linked together.
Document 15: Stanisławów Ghetto: Stanisławów Ghetto (Polish: "getto w Stanisławowie" , German: "Ghetto Stanislau" ) was a Jewish World War II ghetto established in 1941 by the "Schutzstaffel" ("SS") in the prewar Polish city of Stanisławów in the south-eastern region of Kresy (now Ivano-Frankivsk, Ukraine) occupied by Germany after Operation Barbarossa. Before the joint Nazi-Soviet invasion of Poland in 1939 Stanisławów was the capital of the Stanisławów Voivodeship in the Second Polish Republic. The Soviets annexed the city to the Ukrainian SSR in 1939 along with the entire region, but renamed it as Ivano-Frankivsk in 1962, long after the war ended. In 1941 Stanisławów (then, Stanyslaviv) was overrun again, this time by the Wehrmacht army, in the course of the German attack on the Russian positions behind the Curzon Line (see map, marked in red), and incorporated it into their own "Distrikt Galizien", as the fifth district of the "Generalgouvernement".
ground_truth: NKVD prisoner massacres