A quadrille.

Quadrille is a choreographed dressage ride, commonly performed to music, which is often compared to an equestrian ballet or to a drill team. A minimum of four horses are used, although many times more (always in pairs), which perform movements together. Quadrille may be ridden as a performance, such as those given by the Spanish Riding School, or as a competitive test with judging. At the highest level, quadrille includes movements such as shoulder-in, travers, half-pass, passage, flying changes, and canter pirouettes. An upper-level dressage competitor performing an extended trot Dressage (a French term meaning training) is a path and destination of competitive horse training, with competitions held at all levels from amateur to the Olympics. ... A Lipizzan horse in the Winter Riding School The Spanish Riding School of Vienna, Austria, is a traditional riding school for Lipizzan horses. ... There are several people and places that have the name Travers: Dahlia Travers Fritz Travers, mayor of Wiesbaden from 1919 to 1929 Mary Travers, two singers and one reporter for Action 7 on an ABC affiliate WKBW-TV. Travers River, New Zealand Val-de-Travers, a district in the canton... The half-pass is a dressage movement in which the horse moves forward and sideways at the same time. ... The passage is a movement seen in upper-level dressage, in which the horse performs a highly-elevated and extremely powerful trot. ... The flying change is a movement performed by a horse in which he changes leads at the canter. ... Horse gaits are the different methods by which a horse, either naturally or through human training, moves itself. ... A pirouette is a movement asked of a horse in dressage. ...