Polo was invented and popularized by the ancient Persia. The game first played in Persia at dates given from the 5th century BC. or much earlier, to the 1st century AD and originated there, polo was at first a training game for cavalry units, usually the king's guard or other elite troops. To the warlike tribesmen, who played it with as many as 100 to a side, it was a miniature battle. In time polo became an Iranian national sport played normally by the nobility. Women as well as men played the game, as indicated by references to the queen and her ladies engaging King Khosrow II Parviz and his courtiers in the 6th century AD. Certainly Persian literature and art give us the richest accounts of polo in antiquity. Ferdowsi, the famed Iranian poet-historian, gives a number of accounts of royal chogan tournaments in his 9th century epic, Shahnameh (the Epic of Kings). In the earliest account, Ferdowsi romanticises an international match between Turanian force and the followers of Siyâvash, a legendary Iranian prince from the earliest centuries of the Empire; the poet is eloquent in his praise of Siyâvash's skills on the polo field. Ferdowsi also tells of Emperor Shapur II of the Sassanid dynasty of the 4th century who learned to play polo when he was only seven years old. Naqsh-i Jahan Square in Isfahan is in fact a polo field which was built by king Abbas I in 17th century.
Sultan Qutb-ud-din Aibak, the Turkic Emperor of North India, ruled as an emperor for only four years, from 1206 to 1210 but died accidentally in 1210 playing polo. While he was playing a game of polo on horseback (also called chougan in Persia), his horse fell and Aibak was impaled on the pommel of his saddle. He was buried near the Anarkali bazaar in Lahore (which is now in Pakistan). Aibak's son Aram, died in 1211 CE , so Shams-ud-din Iltutmish, another ex-slave of Turkic ancestry who was married to Aibak's daughter, succeeded him as Sultan of Delhi.
From Persia, in medieval times polo spread to the Byzantines (who called it tzykanion), and after the Muslim conquests to the Ayyubid and Mameluke dynasties of Egypt and the Levant, whose elites favoured it above all other sports. Notable sultans such as Saladin and Baybars were known to play it and encourage it in their court. Polo sticks were features on the Mameluke precursor to modern day playing cards.
Later on Polo was passed from Persia to other parts of Asia including the Indian subcontinent and China, where it was very popular during the Tang Dynasty and frequently depicted in paintings and statues. Valuable for training cavalry, the game was played from Constantinople to Japan by the Middle Ages. Known in the East as the Game of Kings. The name polo is said to have been derived from the Tibetan[disambiguation needed] word "pulu", meaning ball.