The British Bull Dog was a popular type of solid-frame pocket revolver introduced by Philip Webley & Son of Birmingham, England, in 1872, and subsequently copied by gunmakers in continental Europe and the United States. It featured a 2.5-inch (64 mm) barrel and was chambered for .442 Webley or .450 Adams cartridges, with a five-round cylinder. Webley produced smaller scaled .320 Revolver and .380 calibre versions later, but did not mark them with the British Bull Dog name.

Charles Julius Guiteau was an American man who assassinated James A. Garfield, president of the United States, in 1881. Guiteau falsely believed he had played a major role in Garfield's election victory, for which he should have been rewarded with a consulship. He felt frustrated and offended by the Garfield administration's rejections of his applications to serve in Vienna or Paris to such a degree that he decided to kill Garfield and shot him at the Baltimore and Potomac Railroad Station in Washington, D.C. Garfield died two months later from infections related to the wounds. In January 1882, Guiteau was sentenced to death for the crime and was hanged five months later.