Bloody Sunday was an event which took place in London, England on 13 November 1887, when a crowd of marchers protesting about unemployment and the Irish Coercion Acts, as well as demanding the release of MP William O'Brien, clashed with the Metropolitan Police. The demonstration was organised by the Social Democratic Federation and the Irish National League. Violent clashes took place between the police and demonstrators, many "armed with iron bars, knives, pokers and gas pipes". A contemporary report noted that 400 were arrested and 75 persons were badly injured, including many police, two policemen being stabbed and one protester bayonetted.

General Sir Charles Warren, was an officer in the British Royal Engineers. He was one of the earliest European archaeologists of the Biblical Holy Land, and particularly of the Temple Mount. Much of his military service was spent in British South Africa. Previously he was Commissioner of Police of the Metropolis, the head of the London Metropolitan Police, from 1886 to 1888 during the Jack the Ripper murders. His command in combat during the Second Boer War was criticised, but he achieved considerable success during his long life in his military and civil posts.