 The polity was located on the eastern border of modern Algeria, bordered by the Roman province of Mauretania (in modern Algeria and Morocco) to the west, the Roman province of Africa (modern Tunisia) to the east, the Mediterranean to the north, and the Sahara Desert to the south.Its people were the Numidians.The name "Numidia" was first applied by Polybius and other historians during the third century BC to indicate the territory west of Carthage, including the entire north of Algeria as far as the river Mulucha (Muluya), about west of Oran.