It COULD be in the Olympics by Egantx7

Question 1

This sport was on the program at five Olympics between 1900 and 1936. Each team consists of four players playing positions generally numbered 1-4. The game is divided into four or eight 7-minute periods called chukkas. Originating in the Persian Empire (or thereabouts), it is generally played on a field that is roughly 300 yards by 160 yards. What is this sport which generally sees the best player on the team playing the #3 position.