A three-horse team is a type of horse-drawn vehicle that consists of three horses harnessed side-by-side. The two most common types of three-horse teams are the TROIKA and the randem. A TROIKA is a Russian three-horse team, with the horses harnessed abreast in a single line, while a randem is a British three-horse team, with the horses harnessed in pairs. Both types of three-horse teams are used for transportation, racing, and ceremonial purposes.