Various forms of Polo, and similar sports, have been long played, traditionally, throughout a wide range covering Assam and Manipur areas of India, Kashmir, Nepal and Tibet, and the Northern valleys of Pakistan such as Gilgit, Hunza Valley, Baltistan and Chitral District and parts of Central Asia as well. In ancient Persia, "Chavgan", another form of Polo, was also played. It was only in the mid-19th century that colonial officers in British India began to play this sport and imported it to Britain, where the formal Hurlingham Rules were then laid down. Later, in the 1890s, Polo was also introduced to the United States.