Moulouya River
The Romans called this river "Malva". The Moulouya River formed the eastern border of the kingdom of Mauritania since King Bocchus I, and more recently of the Rif Republic in the 1920s, a small part of Morocco containing important cities like Saïdia and Oujda lying to the east, between the Moulouya and the border with Algeria. Until 1956 the river also formed the eastern border of the Spanish Protectorate of Morocco.