Nomads were a community who move from one place to another place as a way of obtainingfood. They did not had fixed habitation. Such groups included hunter gatherers, pastoral nomads and trade nomads.
The Mongol empire was the largest contiguous land empire in history during 13th and 14th century. The Mongol empire is called nomadic empire because this empire emerged from the unification of several nomadic tribes under the leadership of Genghis Khan.