Combined driving is an equestrian sport involving carriage driving. In this discipline, the driver sits on a vehicle drawn by a single horse, a pair or a team of four. The sport has three phases: dressage, cross-country marathon and obstacle cone driving — patterned after the mounted equestrian sport of eventing. It is one of the ten international equestrian sport horse disciplines recognized by the Fédération Équestre Internationale (FEI). Combined driving became an FEI discipline in 1970 when Prince Philip, Duke of Edinburgh, the then-president of FEI, produced the first rule book.