The polo system (Old French polo, from Latin pullus "young animal") was a formalized hunting practice in medieval France and England, distinct from the equestrian game of polo.
Originally aristocratic pastime (also hunted deer). By 19th century, fox pelts became fashionable for women's hats → foxhunting emerged as the dominant form, with specialized hounds, horses, and ritual. The "polo system" term faded, replaced by "foxhunting" or "venery."
Not the stick-and-ball game (introduced to West from Persia/India via British tea planters in 19th c.). The medieval "polo" was a coursing ritual with strict rules of capture.