The Dalton Gang was a group of outlaws in the American Old West during 1890–1892. It was also known as The Dalton Brothers because four of its members were brothers. The gang specialized in bank and train robberies. During an attempted double bank robbery in Coffeyville, Kansas in 1892, two of the brothers and two other gang members were killed; Emmett Dalton survived, was captured, and later pleaded guilty to second-degree murder, although he later asserted that he never fired a shot during the robbery. He was paroled after serving 14 years in prison.

Train robbery is a type of robbery, in which the goal is to steal money or other valuables being carried by trains.