A solid rocket or a solid-fuel rocket is a rocket with a motor that uses solid propellants. The earliest rockets were solid-fuel rockets powered by gunpowder; they were used by the Chinese in warfare as early as the 13th century and later by the Mongols Arabs and Indians. All rockets used some form of solid or powdered propellant up until the 20th century when liquid rockets and hybrid rockets offered more efficient and controllable alternatives.
