Fezzan (Ar. Fazzān; Lat. Fasania/Fazania) is the southwestern region of Libya, covering some 700,000 square kilometers (200,000 square miles), bordering Tripolitania on the north, Cyrenaica and Sudan on the east, the Tibesti massif of Chad on the south, and the Hoggar massif and the Grand Erg Oriental of Algeria on the west. It is mostly a desert with large sand dunes (ergs) and includes mountains, dry river valleys, and oases. It is crossed by Wadi al-Shati in the north, Wadi Irawan in the west…