The Rouran Khaganate , Ruru , or Tantan was the name of a state of Eurasian nomads, presumably proto-Mongols, from the late 4th century until the middle 6th century. It has sometimes been hypothesized that the Rouran are identical to the Pannonian Avars who later appeared in Europe.

The Rouran Khaganate , Ruru , or Tantan was the name of a state of Eurasian nomads, presumably proto-Mongols, from the late 4th century until the middle 6th century. It has sometimes been hypothesized that the Rouran are identical to the Pannonian Avars who later appeared in Europe.