In spite of the great risk, many non-Jewish people across Europe undertook rescue operations, both great and small, to hide or remove people persecuted by the Nazis, especially Jews. This article discusses some of the most notable efforts.

The Holocaust was the state-sponsored, systematic persecution and annihilation of European Jewry by Nazi Germany and its collaborators, between 1933 and 1945. Jews were the primary victims - six million were murdered. Roma (Gypsies), physically and mentally disabled people and Poles were also targeted for destruction or decimation for racial, ethnic, or national reasons. Millions more, including homosexuals, Jehovah's Witnesses, Soviet prisoners of war, and political dissidents also suffered grievous oppression and death under Nazi tyranny. [6:34]

Article about the Jehovah's Witnesses in Germany during World War II, their attitudes toward the Nazis and the war, and their subsequent treatment by the Nazis.

Data by country of the Jewish population in Europe prior to World War II.

Article outlining the roles of the various Allied armies, including the Russian, American, and British forces, in liberating the Nazi concentration camps in the late months of World War II.

Article about the German takeover of the Polish city of Lodz early in World War II.

An account of the role the Majdanek concentration camp in Poland played both in providing labor for the Nazi war effort and in the "final solution" the Nazis planned.

An analysis of the scope of Nazi persecution during World War II, including the Jews, Poles, Roma, and any groups people who did not support the Nazi cause.

This article details the Nazi treatment of Soviet prisoners of war in World War II. Though it is not frequently discussed, there were almost as many Soviet prisoners killed by the Nazis as there were Jews.

An overview of the various resistance and partisan groups who fought against or sabotaged the Nazis throughout Europe during World War II.

An explanation of the term "pogrom" and examples of pogroms in both 19th and early 20th century Russia, and in Germany and Eastern Europe during World War II.

Article about the Nazi movement to annihilate as much of the Polish population as possible during World War II. This article focuses particularly on the non-Jewish portion of the Polish populaton.

An explanation of the term "racism" and how it impacted the rise of Nazism and World War II.

An explanation of the plight of refugees, especially Jewish refugees trying to emigrate from Germany just prior to and during World War II.

Available in Spanish only: From the United States Holocaust Museum this is the "Resistencia espiritual en los ghettos" or "Spiritual Resistance in the Ghettos" entry into the Spanish version of the museum's online Holocaust encyclopedia.

An article about plight of people, especially Jewish people, who were displaced by World War II and had no homes to return to, and how the world-wide community did, and did not, aid them in the years immediately following the war.

An overview of the rise of the Third Reich in Germany prior to World War II.

Article about the camp at Westerbork, the Netherlands, originally created by the Dutch to intern Jewish refugees, but later used as a transit camp by the Nazis, a holding place for Jews being sent to other concentration camps.

The roles of Jewish women and women of other groups targeted by the Nazis is described, but the article also tells of the roles many women played in the various resistance movements during World War II.