Polo
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Polo is a stick and ball game that is played on horseback as a traditional field sport, and is one of the oldest known team sports in the world.
Players playing polo
A Persian miniature from the poem Guy-o Chawgân ("the Ball and the Polo-mallet") during the Safavid dynasty of Persia, showing courtiers on horseback playing polo, 1546 CE
Naqsh-e Jahan Square in Isfahan, Iran, is the site of a medieval royal polo field
The Georgians Playing Polo in the Kingdom of Imereti, by Italian missionary Teramo Castelli, 1640.
Martingale (tack)
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A martingale is any of several designs of tack that are used on horses to control head carriage. Martingales may be seen in a wide variety of equestrian disciplines, both riding and driving. Rules for
The standing martingale.
The tiedown
Running martingale. Note the rings that go around each of the reins, and the rein stops between the martingale rings and the bit rings.
Irish martingale joins the reins, seen here on a racehorse