[Cronos]

The residents of the regions of Asia north of the huge Asian mountain range (does it have a single name?) have a considerable tradition of migrating.

The Himalayas. Essentially the mountain ranges formed when the sub-continent of India slammed into Asia a few millenia ago.

[RightWhale]

Sure that is part, and not even most of it. The Caucusus is attached, what is north of Iran, what goes up into China around the Gobi Desert, it's all one big mountain chain. North of all that.