The Holocaust: The SS-Einsatzgruppen round up roughly 25,000 Jews from the Riga Ghetto and kill them in the Rumbula massacre.

The Holocaust, known in Hebrew as the Shoah, was the genocide of European Jews during World War II. From 1941 to 1945, Nazi Germany and its collaborators systematically murdered some six million Jews across German-occupied Europe, around two-thirds of Europe's Jewish population. The murders were committed primarily through mass shootings across Eastern Europe and poison gas chambers in extermination camps, chiefly Auschwitz-Birkenau, Treblinka, Belzec, Sobibor, and Chełmno in occupied Poland. Separate Nazi persecutions killed millions of other non-Jewish civilians and prisoners of war (POWs); the term Holocaust is sometimes used to include the murder and persecution of non-Jewish groups.

Einsatzgruppen were Schutzstaffel (SS) paramilitary death squads of Nazi Germany that were responsible for mass murder, primarily by shooting, during World War II (1939–1945) in German-occupied Europe. The Einsatzgruppen had an integral role in the implementation of the so-called "Final Solution to the Jewish question" in territories conquered by Nazi Germany, and were involved in the murder of much of the intelligentsia and cultural elite of Poland, including members of the Catholic priesthood. Almost all of the people they murdered were civilians, beginning with the intelligentsia and swiftly progressing to Soviet political commissars, Jews, and Romani people, as well as actual or alleged partisans throughout Eastern Europe.

Riga Ghetto was a small area in Maskavas Forštate, a neighbourhood of Riga, Latvia, where Nazis forced Jews from Latvia, and later from the German "Reich", to live during World War II. On October 25, 1941, the Nazis evicted the ghetto's non-Jewish inhabitants and relocated all Jews from Riga and its vicinity there. Most Latvian Jews were killed on November 30 or December 8, 1941, in the Rumbula massacre. The Nazis transported a large number of German Jews to the ghetto; most of them were later killed in massacres.