What is "mardistan"

The district of Mardistan, in historic Armenia, corresponds to Artaz, west of the modern Maku, Iranian Azerbaijan. The district of Mardali (Mardaghi) must have been located to the south of Erzurum, north of the Bingöl sources. The Mards of this section of the country were evidently immigrants from the South, says Adontz.