The title says it best. Britain had double action revolvers. The United States
Army had Colt Model 1848 Walker Dragoons, and later, Model 1860 single action revolvers. Webley & Scott was one of many British double action revolvers used by the South during the Civil War. The United States also had a
few double action revolvers: Remington, Starr, and Pettingill, to name three.
However, the majority of its revolvers were single action revolvers.