The American Saddlebred is a horse breed from the United States. Descended from riding-type horses bred at the time of the American Revolution, the American Saddlebred includes the Narragansett Pacer, Canadian Pacer, Morgan and Thoroughbred among its ancestors. Developed into its modern type in Kentucky, it was once known as the "Kentucky Saddler", and used extensively as an officer's mount in the American Civil War. In 1891, a breed registry was formed in the United States.