massacre of peaceful protesters at Winter's Square in St. Petersberg in 1905 that turned ordinary workers against the tsar and produced a wave of general indignation. (p. 838)
Bloody Sunday (; ) is the term used to describe an incident that took place at the beginning of World War II. On September 3, 1939, two days after the German invasion of Poland, a highly controversial massacre occurred in and around the town of Bydgoszcz in the Polish Pomeranian Voivodeship. The number of casualties involved is disputed by historians.
Bloody Sunday of 1920 was a day of violence in Dublin on November 21, 1920, during the Irish War of Independence (1919–1921), which led to the deaths of more than 30 people.