Nazi concentration camps in the context of "Vistula–Oder Offensive"

The V-2 rocket (German: Vergeltungswaffe 2, lit. 'Vengeance Weapon 2'), with the development name Aggregat-4 (A4), was the world's first long-range guided ballistic missile. The missile, powered by a liquid-propellant rocket engine, was developed during the Second World War in Nazi Germany as a "vengeance weapon" and assigned to attack Allied cities as retaliation for the Allied bombings of German cities. The V2 rocket also became the first artificial object to travel into space by crossing the Kármán line (edge of space) with the vertical launch of MW 18014 on 20 June 1944.

Research of military use of long-range rockets began when the graduate studies of Wernher von Braun were noticed by the German Army. A series of prototypes culminated in the A4, which went to war as the V2. Beginning in September 1944, more than 3,000 V2s were launched by the Wehrmacht against Allied targets, first London and later Antwerp and Liège. According to a 2011 BBC documentary, the attacks from V-2s resulted in the deaths of an estimated 9,000 civilians and military personnel, while a further 12,000 laborers and concentration camp prisoners died as a result of their forced participation in the production of the weapons.

Kraków, officially the Royal Capital City of Kraków, is the second-largest and one of the oldest cities in Poland. Situated on the Vistula River in Lesser Poland Voivodeship, the city has a population of 804,237 (2023), with approximately 8 million additional people living within a 100 km (62 mi) radius. Kraków was the official capital of Poland until 1596 and has traditionally been one of the leading centres of Polish academic, cultural, and artistic life. Cited as one of Europe's most beautiful cities, its Old Town was declared a UNESCO World Heritage Site in 1978, one of the world's first sites granted the status.

The city began as a hamlet on Wawel Hill and was a busy trading centre of Central Europe in 985. In 1038, it became the seat of Polish monarchs from the Piast dynasty, and subsequently served as the centre of administration under Jagiellonian kings and of the Polish–Lithuanian Commonwealth until the late 16th century, when Sigismund III transferred his royal court to Warsaw. With the emergence of the Second Polish Republic in 1918, Kraków reaffirmed its role as the nucleus of a national spirit. After the invasion of Poland, at the start of World War II, the newly defined Distrikt Krakau became the seat of Nazi Germany's General Government. The Jewish population was forced into the Kraków Ghetto, a walled zone from where they were sent to Nazi extermination camps such as the nearby Auschwitz, and Nazi concentration camps like Płaszów. However, the city was spared from destruction. In 1978, Karol Wojtyła, archbishop of Kraków, was elevated to the papacy as Pope John Paul, the first non-Italian pope in 455 years.

Nazi Germany used six extermination camps (German: Vernichtungslager), also called death camps (Todeslager), or killing centers (Tötungszentren), in Central Europe, primarily in German-occupied Poland, during World War II to systematically murder over 2.7 million people—mainly Jews—in the Holocaust. The victims of death camps were primarily murdered by gassing, either in permanent installations constructed for this specific purpose, or by means of gas vans. The six extermination camps were Chełmno, Bełżec, Sobibor, Treblinka, Majdanek and Auschwitz-Birkenau. Extermination through labour was also used at the Auschwitz and Majdanek death camps. Millions were also murdered in concentration camps, in the Aktion T4, or directly on site. Additionally, camps operated by Nazi allies have also been described as extermination or death camps, most notably the Jasenovac concentration camp in the Independent State of Croatia.

The National Socialists made no secret of the existence of concentration camps as early as 1933, as they served as a deterrent to resistance. The extermination camps, on the other hand, were kept strictly secret. To disguise the mass murder, even in internal correspondence, they only referred to it as "special treatment," "cleansing," "resettlement," or "evacuation." The SS referred to the extermination camps as concentration camps. Their internal organizational structures were also largely identical. The term "extermination camp" was only used later in historical scholarship and in court cases and serves to further categorize the camps.

Auschwitz (German: [ˈaʊ̯ʃvɪts]), also known as Oświęcim (Polish: [ɔˈɕfjɛɲ.t͡ɕim]), was a complex of over 40 concentration and extermination camps operated by Nazi Germany in occupied Poland (in a portion annexed into Germany in 1939) during World War II and the Holocaust. It consisted of Auschwitz I, the main camp (Stammlager) in Oświęcim; Auschwitz II-Birkenau, a concentration and extermination camp with gas chambers, Auschwitz III-Monowitz, a labour camp for the chemical conglomerate IG Farben, and dozens of subcamps. The camps became a major site of the Nazis' Final Solution to the Jewish question.

After Germany initiated World War II by invading Poland in September 1939, the Schutzstaffel (SS) converted Auschwitz I, an army barracks, into a prisoner-of-war camp. The initial transport of political detainees to Auschwitz consisted almost solely of Poles (for whom the camp was initially established). For the first two years, the majority of inmates were Polish. In May 1940, German criminals brought to the camp as functionaries established the camp's reputation for sadism. Prisoners were beaten, tortured, and executed for the most trivial of reasons. The first gassings—of Soviet and Polish prisoners—took place in block 11 of Auschwitz I around August 1941.

Between 1933 and 1945, a large number of Jews emigrated from Nazi Germany and German-occupied Europe. This exodus was triggered by the militaristic antisemitism perpetrated by the Nazi Party and by Germany's collaborators, ultimately culminating in the Holocaust. However, even before the genocide itself, which began during World War II, the Nazis had widely sponsored or enforced discriminatory practices—by legislation, in many cases—against Jewish residents, such as through the Nazi boycott of Jewish-owned businesses. Although Adolf Hitler and the German government were initially accepting of voluntary Jewish emigration from the country, it became difficult to find new host countries, particularly as the 1930s were marked by the Great Depression, as the number of Jewish migrants increased. Eventually, the Nazis forbade emigration; the Jews who remained in Germany or in German-occupied territory by this point were either murdered in the ghettos or relocated to be systematically exploited and murdered at dedicated concentration camps and extermination camps throughout the European continent.

Kristallnacht (German pronunciation: [kʁɪsˈtalnaχt] lit. 'crystal night') or the Night of Broken Glass, also called the November pogrom(s) (German: Novemberpogrome, pronounced [noˈvɛm.bɐ.poˌɡʁoːmə] ), was a pogrom against Jews carried out by the Nazi Party's Sturmabteilung (SA) and Schutzstaffel (SS) paramilitary forces along with some participation from the Hitler Youth and German civilians throughout Nazi Germany on 9–10 November 1938. The German authorities looked on without intervening. The euphemistic name Kristallnacht comes from the shards of broken glass that littered the streets after the windows of Jewish-owned stores, buildings, and synagogues were smashed. The pretext for the attacks was the assassination, on 9 November 1938, of the German diplomat Ernst vom Rath by Herschel Grynszpan, a 17-year-old German-born Polish Jew living in Paris.

Jewish homes, hospitals and schools were ransacked as attackers demolished buildings with sledgehammers. Rioters destroyed over 1,400 synagogues and prayer rooms throughout Germany, Austria, and the Sudetenland. Over 7,000 Jewish businesses were damaged or destroyed, and 30,000 Jewish men were arrested and incarcerated in concentration camps. British historian Martin Gilbert wrote that no event in the history of German Jews between 1933 and 1945 was so widely reported as it was happening, and the accounts from foreign journalists working in Germany drew worldwide attention. The Times of London observed on 11 November 1938: "No foreign propagandist bent upon blackening Germany before the world could outdo the tale of burnings and beatings, of blackguardly assaults on defenceless and innocent people, which disgraced that country yesterday."

Nazi human experimentation was a series of medical experiments on prisoners by Nazi Germany in its concentration camps mainly between 1942 and 1945. There were 15,754 documented victims, of various nationalities and ages, although the true number is believed to be more. About a quarter of documented victims were killed and survivors generally experienced severe permanent injuries.

At Auschwitz and other camps, under the direction of Eduard Wirths, selected inmates were subjected to various experiments that were designed to help German military personnel in combat situations, develop new weapons, aid in the recovery of military personnel who had been injured, and to advance Nazi racial ideology and eugenics, including the twin experiments of Josef Mengele. Aribert Heim conducted similar medical experiments at Mauthausen.

Dulag 121 camp in Pruszków (Durchgangslager [pl] 121 Pruszków) was a Nazi transit camp where civilian population from Warsaw and surrounding areas, expelled from their homes during and after the Warsaw Uprising, was gathered.

The camp was established on 6 August 1944, on the premises of the former Railway Rolling Stock Repair Works in Pruszków [pl]. It operated until mid-December 1944, and in a residual form, until 16 January 1945. During this period, between 390,000 and 410,000 people passed through Dulag 121, among whom tens of thousands were deported to forced labor in the depths of the Reich or sent to concentration camps after a short stay in the camp. Due to diseases, exhaustion, or at the hands of guards, hundreds to several thousand prisoners of Dulag 121 perished. However, over 30,000 people managed to leave the camp thanks to the assistance of the Polish personnel employed there.

The military occupation of Latvia by Nazi Germany was completed on 10 July 1941, by Germany's armed forces. Initially, the territory of Latvia was under the military administration of Army Group North, but on 25 July 1941, Latvia was incorporated as Generalbezirk Lettland, subordinated to Reichskommissariat Ostland, an administrative subdivision of Nazi Germany. Anyone not racially acceptable or who opposed the German occupation, as well as those who had cooperated with the Soviet Union, was killed or sent to concentration camps in accordance with the Nazi Generalplan Ost.

Holocaust survivors are people who survived the Holocaust, defined as the persecution and attempted annihilation of the Jews by Nazi Germany and its collaborators before and during World War II in Europe and North Africa. There is no universally accepted definition of the term, and it has been applied variously to Jews who survived the war in German-occupied Europe or other Axis territories, as well as to those who fled to Allied and neutral countries before or during the war. In some cases, non-Jews who also experienced collective persecution under the Nazi regime are considered Holocaust survivors as well. The definition has evolved over time.

Survivors of the Holocaust include those persecuted civilians who were still alive in the concentration camps when they were liberated at the end of the war, or those who had either survived as partisans or had been hidden with the assistance of non-Jews, or had escaped to territories beyond the control of the Nazis before the Final Solution was implemented.