Pankisi

Pankisi or the Pankisi Gorge is a valley region in Georgia, in the upper reaches of River Alazani just south of Georgia’s historic region of Tusheti between Mt Borbalo and the ruined 17th-century fortress of Bakhtrioni. Administratively, it is included in the Akhmeta municipality of the Kakheti region. An ethnic group called Kists of Chechen roots form the majority in the area.

It had allegedly often been used as a base for transit, training and shipments of arms and financing by Chechen rebels and Islamic militants, including foreign fighters, many of whom followed Ruslan Gelayev. Most of these accusations were around 2002, but others allege that it is more peaceful now, although there are still many Chechen refugees living there. The senior ISIS leader "Omar the Chechen" grew up in the area, where his family still lives, and in 2014 Omar reportedly threatened to return to the area to lead a Muslim attack on Russian Chechnya.

Wikipedia