Harness racing use a standing start. The sulky (informally known as a "bike") is a light, two-wheeled cart equipped with bicycle wheels. The driver (not a "jockey", as in thoroughbred racing) carries a light whip chiefly used to signal the horse by tapping and to make noise by striking the sulky shaft. There are strict rules as to how and how much the whip may be used; in some jurisdictions (like Norway), whips are forbidden. For exercising or training, the drivers use what is known as a "jog cart," which is a sulky that is heavier and bulkier than a racing unit.
Horses in warfare groups. The use of horses in organised warfare was also documented early in recorded history. One of the first depictions of equids is the "war panel" of the Standard of Ur, in Sumer, dated c. 2500 BC, showing horses (or possibly onagers or mules) pulling a four-wheeled wagon. Among the earliest evidence of chariot use are the burials of horse and chariot remains by the Andronovo (Sintashta-Petrovka) culture in modern Russia and Kazakhstan, dated to approximately 2000 BC. The oldest documentary evidence of what was probably chariot warfare in the Ancient Near East is the Old Hittite Anitta text, of