Further east of this area, Fulani communities become predominantly nomadic, and exist at less organized social systems. These are the areas of the Chari-Baguirmi Region and its river systems, in Chad and the Central African Republic, the Ouaddaï highlands of Eastern Chad, the areas around Kordofan, Darfur and the Blue Nile, Sennar, Kassala regions of Sudan,[35] as well as the Red Sea coastal city of Port Sudan. The Fulani on their way to or back from the pilgrimage to Mecca, Saudi Arabia, settled in many parts of eastern Sudan, today representing a distinct community of over 2 million people referred to as the Fellata.[36][37][38]