The Holocaust was the systematic, state-sponsored persecution and murder of six million European Jews by the Nazi German regime and its allies and collaborators. The Holocaust was an evolving process that took place throughout Europe between 1933 and 1945.

Antisemitism was at the foundation of the Holocaust. Antisemitism, the hatred of or prejudice against Jews, was a basic tenet of Nazi ideology. This prejudice was also widespread throughout Europe.

Nazi Germany’s persecution of Jews evolved and became increasingly more radical between 1933 and 1945. This radicalization culminated in the mass murder of six million Jews.

During World War II, Nazi Germany and its allies and collaborators killed nearly two out of every three European Jews using deadly living conditions, brutal mistreatment, mass shootings and gassings, and specially designed killing centers.

The Holocaust (1933–1945) was the systematic, state-sponsored persecution and murder of six million European Jews by the Nazi German regime and its allies and collaborators. In addition to perpetrating the Holocaust, Nazi Germany also persecuted and murdered millions of other victims.

What was the Holocaust?

The United States Holocaust Memorial Museum defines the years of the Holocaust as 1933–1945. The Holocaust era began in January 1933 when Adolf Hitler and the Nazi Party came to power in Germany. It ended in May 1945, when the Allied Powers defeated Nazi Germany in World War II. The Holocaust is also sometimes referred to as “the Shoah,” the Hebrew word for “catastrophe.”

When they came to power in Germany, the Nazis did not immediately start to carry out the mass murder of Jews. However, they quickly began using the government to target and exclude Jews from German society. Among other antisemitic measures, the Nazi German regime enacted discriminatory laws and organized violence targeting Germany’s Jews. The Nazi persecution of Jews became increasingly radical between 1933 and 1945. This radicalization culminated in a plan that Nazi leaders referred to as the "Final Solution to the Jewish Question.” The “Final Solution” was the organized and systematic mass murder of European Jews. The Nazi German regime implemented this genocide between 1941 and 1945.

By the end of the Holocaust, the Nazi German regime and their allies and collaborators had murdered six million European Jews.

Why did the Nazis target Jews?

The Nazis targeted Jews because the Nazis were radically antisemitic. This means that they were prejudiced against and hated Jews. In fact, antisemitism was a basic tenet of their ideology and at the foundation of their worldview.

The Nazis falsely accused Jews of causing Germany’s social, economic, political, and cultural problems. In particular, they blamed them for Germany’s defeat in World War I (1914–1918). Some Germans were receptive to these Nazi claims. Anger over the loss of the war and the economic and political crises that followed contributed to increasing antisemitism in German society. The instability of Germany under the Weimar Republic (1918–1933), the fear of communism, and the economic shocks of the Great Depression also made many Germans more open to Nazi ideas, including antisemitism.

However, the Nazis did not invent antisemitism. Antisemitism is an old and widespread prejudice that has taken many forms throughout history. In Europe, it dates back to ancient times. In the Middle Ages (500–1400), prejudices against Jews were primarily based in early Christian belief and thought, particularly the myth that Jews were responsible for the death of Jesus. Suspicion and discrimination rooted in religious prejudices continued in early modern Europe (1400–1800). At that time, leaders in much of Christian Europe isolated Jews from most aspects of economic, social, and political life. This exclusion contributed to stereotypes of Jews as outsiders. As Europe became more secular, many places lifted most legal restrictions on Jews. This, however, did not mean the end of antisemitism. In addition to religious antisemitism, other types of antisemitism took hold in Europe in the 18th and 19th centuries. These new forms included economic, nationalist, and racial antisemitism. In the 19th century, antisemites falsely claimed that Jews were responsible for many social and political ills in modern, industrial society. Theories of race, eugenics, and Social Darwinism falsely justified these hatreds. Nazi prejudice against Jews drew upon all of these elements, but especially racial antisemitism. Racial antisemitism is the discriminatory idea that Jews are a separate and inferior race.

The Nazi Party promoted a particularly virulent form of racial antisemitism. It was central to the party’s race-based worldview. The Nazis believed that the world was divided into distinct races and that some of these races were superior to others. They considered Germans to be members of the supposedly superior “Aryan” race. They asserted that “Aryans” were locked in a struggle for existence with other, inferior races. Further, the Nazis believed that the so-called “Jewish race” was the most inferior and dangerous of all. According to the Nazis, Jews were a threat that needed to be removed from German society. Otherwise, the Nazis insisted, the “Jewish race” would permanently corrupt and destroy the German people. The Nazis’ race-based definition of Jews included many persons who identified as Christians or did not practice Judaism.

Where did the Holocaust take place?

The Holocaust was a Nazi German initiative that took place throughout German- and Axis-controlled Europe. It affected nearly all of Europe’s Jewish population, which in 1933 numbered 9 million people.

The Holocaust began in Germany after Adolf Hitler was appointed chancellor in January 1933. Almost immediately, the Nazi German regime (which called itself the Third Reich) excluded Jews from German economic, political, social, and cultural life. Throughout the 1930s, the regime increasingly pressured Jews to emigrate.

But the Nazi persecution of Jews spread beyond Germany. Throughout the 1930s, Nazi Germany pursued an aggressive foreign policy. This culminated in World War II, which began in Europe in 1939. Prewar and wartime territorial expansion eventually brought millions more Jewish people under German control.

Nazi Germany’s territorial expansion began in 1938–1939. During this time, Germany annexed neighboring Austria and the Sudetenland and occupied the Czech lands. On September 1, 1939, Nazi Germany began World War II (1939–1945) by attacking Poland. Over the next two years, Germany invaded and occupied much of Europe, including western parts of the Soviet Union. Nazi Germany further extended its control by forming alliances with the governments of Italy, Hungary, Romania, and Bulgaria. It also created puppet states in Slovakia and Croatia. Together these countries made up the European members of the Axis alliance, which also included Japan.

By 1942—as a result of annexations, invasions, occupations, and alliances—Nazi Germany controlled most of Europe and parts of North Africa. Nazi control brought harsh policies and ultimately mass murder to Jewish civilians across Europe.

The Nazis and their allies and collaborators murdered six million Jews.

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What was the “Final Solution to the Jewish Question”?

The Nazi “Final Solution to the Jewish Question” (“Endlösung der Judenfrage”) was the deliberate and systematic mass murder of European Jews. It was the last stage of the Holocaust and took place from 1941 to 1945. Though many Jews were killed before the "Final Solution" began, the vast majority of Jewish victims were murdered during this period.

As part of the “Final Solution,” Nazi Germany committed mass murder on an unprecedented scale. There were two main methods of killing. One method was mass shooting. German units carried out mass shootings on the outskirts of villages, towns, and cities throughout eastern Europe. The other method was asphyxiation with poison gas. Gassing operations were conducted at killing centers and with mobile gas vans.

Mass Shootings

The Nazi German regime perpetrated mass shootings of civilians on a scale never seen before. After Germany invaded the Soviet Union in June 1941, German units began to carry out mass shootings of local Jews. At first, these units targeted Jewish men of military age. But by August 1941, they had started massacring entire Jewish communities. These massacres were often conducted in broad daylight and in full view and earshot of local residents.

Mass shooting operations took place in more than 1,500 cities, towns, and villages across eastern Europe. German units tasked with murdering the local Jewish population moved throughout the region committing horrific massacres. Typically, these units would enter a town and round up the Jewish civilians. They would then take the Jewish residents to the outskirts of the town. Next, they would force them to dig a mass grave or take them to mass graves prepared in advance. Finally, German forces and/or local auxiliary units would shoot all of the men, women, and children into these pits. Sometimes, these massacres involved the use of specially designed mobile gas vans. Perpetrators would use these vans to suffocate victims with carbon monoxide exhaust.

Germans also carried out mass shootings at killing sites in occupied eastern Europe. Typically these were located near large cities. These sites included Fort IX in Kovno (Kaunas), the Rumbula and Bikernieki Forests in Riga, and Maly Trostenets near Minsk. At these killing sites, Germans and local collaborators murdered tens of thousands of Jews from the Kovno, Riga, and Minsk ghettos. They also shot tens of thousands of German, Austrian, and Czech Jews at these killing sites. At Maly Trostenets, thousands of victims were also murdered in gas vans.

The German units that perpetrated the mass shootings in eastern Europe included Einsatzgruppen (special task forces of the SS and police), Order Police battalions, and Waffen-SS units. The German military (Wehrmacht) provided logistical support and manpower. Some Wehrmacht units also carried out massacres. In many places, local auxiliary units working with the SS and police participated in the mass shootings. These auxiliary units were made up of local civilian, military, and police officials.

As many as 2 million Jews were murdered in mass shootings or gas vans in territories seized from Soviet forces.

Killing Centers

In late 1941, the Nazi regime began building specially designed, stationary killing centers in German-occupied Poland. In English, killing centers are sometimes called “extermination camps” or “death camps.” Nazi Germany operated five killing centers: Chelmno, Belzec, Sobibor, Treblinka, and Auschwitz-Birkenau. They built these killing centers for the sole purpose of efficiently murdering Jews on a mass scale. The primary means of murder at the killing centers was poisonous gas released into sealed gas chambers or vans.

German authorities, with the help of their allies and collaborators, transported Jews from across Europe to these killing centers. They disguised their intentions by calling the transports to the killing centers “resettlement actions” or “evacuation transports.” In English, they are often referred to as “deportations.” Most of these deportations took place by train. In order to efficiently transport Jews to the killing centers, German authorities used the extensive European railroad system, as well as other means of transportation. In many cases the railcars on the trains were freight cars; in other instances they were passenger cars.

The conditions on deportation transports were horrific. German and collaborating local authorities forced Jews of all ages into overcrowded railcars. They often had to stand, sometimes for days, until the train reached its destination. The perpetrators deprived them of food, water, bathrooms, heat, and medical care. Jews frequently died en route from the inhumane conditions.

The vast majority of Jews deported to killing centers were gassed almost immediately after their arrival. Some Jews whom German officials believed to be healthy and strong enough were selected for forced labor.

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Who were the other victims of Nazi persecution and mass murder?

The Holocaust specifically refers to the systematic, state-sponsored persecution and murder of six million Jews. However, there were also millions of other victims of Nazi persecution and murder. In the 1930s, the regime targeted a variety of alleged domestic enemies within German society. As the Nazis extended their reach during World War II, millions of other Europeans were also subjected to Nazi brutality.

The Nazis classified Jews as the priority “enemy.” However, they also targeted other groups as threats to the health, unity, and security of the German people. The first group targeted by the Nazi regime consisted of political opponents. These included officials and members of other political parties and trade union activists. Political opponents also included people simply suspected of opposing or criticizing the Nazi regime. Political enemies were the first to be incarcerated in Nazi concentration camps. Jehovah’s Witnesses were also incarcerated in prisons and concentration camps. They were arrested because they refused to swear loyalty to the government or serve in the German military.

The Nazi regime also targeted Germans whose activities were deemed harmful to German society. These included men accused of homosexuality, persons accused of being professional or habitual criminals, and so-called asocials (such as people identified as vagabonds, beggars, prostitutes, pimps, and alcoholics). Tens of thousands of these victims were incarcerated in prisons and concentration camps. The regime also forcibly sterilized and persecuted Afro-Germans.

People with disabilities were also victimized by the Nazi regime. Before World War II, Germans considered to have supposedly unhealthy hereditary conditions were forcibly sterilized. Once the war began, Nazi policy radicalized. People with disabilities, especially those living in institutions, were considered both a genetic and a financial burden on Germany. These people were targeted for murder in the so-called Euthanasia Program.

The Nazi regime employed extreme measures against groups considered to be racial, civilizational, or ideological enemies. This included Roma (Gypsies), Poles (especially the Polish intelligentsia and elites), Soviet officials, and Soviet prisoners of war. The Nazis perpetrated mass murder against these groups.