Arrianosz, Curtius Rufus és más szerzők leírásai alapján a dahák Baktriától északkeletre és Szogdiától keletre élő nagyállattartó-lovas nép voltak.

According to his biographers, Alexander later also incorporated Dahae into his own cavalry (Arrian, Anabasis 5.12.2; cf. Curtius Rufus, 7.7.32). They were described as “horseriding” bowmen (cf. Appian, Syriaca 167) and were said to have lived in the wastes northeast of Bactria and east of Sogdiana. At least some of the Dahae must thus be placed along the eastern fringes of the Karakum desert, near ancient Margiana, a conclusion confirmed by information found in some other classical sources (e.g., Ptolemy, Geog­raphy 6.10.2; Tacitus, Annales 11.10). It is possible that the Dahae were thus responsible for nomadic invasions of Margiana and Areia some time around 300 b.c.e., in which the towns of Alexandreia and Heracleia, the first located in Margiana, the latter apparently in Areia, were destroyed (cf. Pliny, Historia naturalis 6.47-48; 33; 6.67; Strabo 11.516).

Dahistān, Dahestān, Dahēstān: ‘a town in Gurgān, i.e. in ancient Tabaristān’

http://info.filg.uj.edu.pl/zhjij/sec/store/sec-13.pdf