Polo taken. The official set of rules and rules interpretations are reviewed and published annually by each country's polo association. Most of the smaller associations follow the rules of the Hurlingham Polo Association, the national governing body of the sport of polo in the United Kingdom, and the United States Polo Association. Outdoor or field polo consists of four to eight 7-minute chukkas, between or during which players change mounts. At the end of each 7 minute chukka, play continues for an additional 30 seconds or until a stoppage in play, whichever comes first. There is a four-minute interval between chukkas
United States Polo Association 1920s. College polo came of age and indoor polo grew in popularity championed by George Sherman and Robert A. Graviss. Contributing to the growth of polo during this period was the U.S. Army, who after joining the USPA in 1902, encouraged their members to participate in polo to improve their riding ability. From that time until World War II, the military would play a significant role in growing and sustaining the sport of polo by adding significant numbers of players and polo ponies. Polo’s greatest era began in the years between the first and second World Wars. The sport not