Sent by Floyd of USA who went for a month-long holiday in Mauritania. Thank you very much Floyd.
Assaba (Arabic: ولاية العصابة) is a region in southern Mauritania. Its capital is Kifa. Other major cities/towns include Guerou. The region borders the Mauritanian regions of Brakna and Tagant to the north, the Mauritanian region of Hodh El Gharbi to the east, Malito the south, and the Mauritanian regions of Gorgol and Guidimaka to the west. (Source)