Beni Ḥassan (Arabic: بني حسان "sons of Ḥassān") is a Bedouin Arab tribe which inhabits Western Sahara, Mauritania, Morocco and Algeria. It is one of the four sub-tribes of the Banu Maqil who emigrated in the 11th century from South Arabia to the Maghreb with the Banu Hilal and Banu Sulaym Arab tribes. In the 13th century, they took the Sanhaja territories in the southwest of the Sahara. In Morocco, they first settled, alongside their Maqil relatives, in the area between Tadla and the Moulouya River. The Sous Almohad governor called upon them for help against a rebellion in the Sous, and they resettled in and around that region. They later moved to what is today Mauritania, and from the 16th century onwards, they managed to push back all black peoples southwards to the Senegal Valley river. The Beni Hassan and other warrior Arab tribes dominated the Sanhaja Berber tribes of the area after the Char Bouba war of the 17th century. As a result, Arabs became the dominant ethnic group in Western Sahara and Mauretania. The Bani Hassan dialect of Arabic became used in the region and is still spoken, in the form of Hassaniya Arabic. The hierarchy established by the Beni Hassan tribe gave Mauritania much of its sociological character. That ideology has led to oppression, discrimination and even enslavement of other groups in Mauritania.
