Drangiana

Drangiana or Zarangiana (, also attested in Old Western iranian as Zranka was a historical region and administrative division of the Achaemenid Empire. This region comprises territory around lake Hâmûn, wetlands in endorheic Sistan basin on the Irano-Afghan-Pakistan border, and its primary watershed Helmand river in what is nowadays southwestern region of Afghanistan and the Chagai region of western Pakistan.