You mean the Tatars (Tamerlane), Azerbaijan, the various ‘stans’ on the outskits of Russian borders, etc? Uzbek, Kazakh, Turkmen...
http://www.euroheritage.net/tatarcrimeahistory.shtml
http://www.azerb.com/az-hist.html
http://www.galenfrysinger.com/merv.htm
Then it was cleared of its people.
Unlike the Chechnyans, they didn't come back!