Another significant center was the city of Prophthasia, possibly located at modern Farah in Afghanistan. On occasion Drangiana was governed by the same satrap as neighboring Arachosia. In 330-329 BC, the region was conquered by Alexander the Great.
A key location was Prophthasia, potentially located in present-day Farah, Afghanistan.  At times, Drangiana was ruled by the same satrap as Arachosia to its south. In 330-329 BC, Alexander the Great conquered this area.