Variags
From Tolkien Gateway
The Variags were a little-known people who dwelt in the land of Khand, east of Mordor, at the time of the War of the Ring. They were allied to Sauron, and their warriors were seen at the Battle of the Pelennor Fields.
In Peter Jackson's The Return of the King, Variags were depicted as a cross between feudal Japanese and Mongolians, with such objects as the vertical flag attached to the back of the warrior, except that the Variag chieftains rode in chariots.
