The Sud Aviation SE 210 Caravelle was the first short/medium-range jet airliner, produced by the French Sud Aviation firm starting in 1955 (when it was still known as SNCASE). The Caravelle would go on to be one of the more successful European first generation jetliners, selling throughout Europe and even penetrating the United States market, with an order for 20 from United Airlines. The Caravelle established the aft-mounted-engine, clean-wing design that has since been used on a wide variety of subsequent aircraft.