Combined driving (also known as horse driving trials) 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, and is most similar to the mounted equestrian sport of eventing. It is one of the ten international equestrian sport horse disciplines recognized by the Fédération Equestre Internationale (FEI); combined driving became an FEI discipline in 1970.