Some pogroms involve killing, and some escalate to mass killing which can be defined as a massacre. However there are massacres which are not pogroms (when the victims are not targeted by ethnicity), for example St. Bartholomew's Day massacre which eventually spread to the killing of about 6000 protestants cannot be considered a pogrom.
Stephen M Berk, Year of Crisis, Year of Hope: Russian Jewry and the Pogroms of 18811882 (Greenwood, 1985), pp. 5455.
I. Michael Aronson, "Geographical and Socioeconomic Factors in the 1881 Anti-Jewish Pogroms in Russia," Russian Review , Vol. 39, No. 1. (Jan., 1980), pp. 1831 These rumours, however, were clearly of some importance, if only as a trigger, and they had a small kernel of truth: one of the close associates of the assassins, Gesya Gelfman, was indeed Jewish. The fact that the other assassins were all Christians had little impact on the spread of such antisemitic rumours.
The first of these pogroms was Kristallnacht in Nazi Germany, often called Pogromnacht , in which Jewish homes and businesses were destroyed, up to 200 Jews were killed and some 30,000 Jewish men and boys were arrested and sent to concentration camps.
Similarly, the organization of Jewish self-defense leagues (which stopped the pogromists in certain areas during the second Kishinev pogrom), such as Hovevei Zion, led naturally to a strong embrace of Zionism, especially by Russian Jews.
In the years leading up to the Biafran War, ethnic Igbos and others from southeastern Nigeria were victims of targeted attacks. The term is therefore commonly used in the general context of riots against various ethnic groups. Other examples include the pogroms against ethnic Armenians in Sumgait in 1988 and in Baku, in 1990, both of which occurred in Azerbaijan.
In these 1984 Anti-Sikh Riots, Sikhs were killed in pogroms led by government loyalists, with the government allegedly aiding the attacks by furnishing the mobs with voting lists to identify Sikh families.
Source: Wikipedia > Pogrom
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