The Maghrib, also spelled Maghreb, is a region of North Africa that borders the Mediterranean sea. It once included Moorish Spain but is now comprised of the Atlas mountains and coastal plains of Libya, Tunisia, Morocco and Algeria. This region was previously known to Europeans as the Barbary states.
The Arabs migrated to the Maghrib in early Umayyad times and expanded while spreading Islam, which pushed the development of trans-Saharan trade. According to Wikipedia, the Maghrib consists of one percent of the worlds total population as of 2010. The people in this region belong to Arab and Berber ethnolinguistic groups.