The Nuba Mountains are in the center of Sudan. The mountains are home to about 400,000 Nubians who have sought refuge from the onslaught of the Muslim Arabs. They are geographically and culturally a frontier between the Arab North and the Black south. After the collapse of the ancient Christian kingdoms of Nubia, Alwa and Dotawo, and the Islamic invasion of the North of Sudan around the 15th century, many of the survivors took refuge in the Nubia mountains. Over the centuries many slaves escaping the caravans en rout from the heart of Africa to the Muslim world, fled to the mountains for refuge.
Dehydration is a serious problem for anyone exerting effort.
Most of all, they need the Word of God.