Banu Hilal Migration Arabises the Maghreb

Date

c. 1050 onward (11th century)

Category

Social & demographic

Region

Maghreb (North Africa)

Era

Post-Classical / Medieval

Significance

Beginning around 1050, the Banu Hilal and Banu Sulaym, Bedouin Arab tribal confederations from Upper Egypt with origins in the Najd and Hejaz, migrated westward in large numbers into Ifriqiya and the wider Maghreb.

The Fatimid caliphate in Cairo encouraged the movement as retribution against the Zirid dynasty, which had renounced Fatimid (Shia) suzerainty in 1048 and recognised the Abbasid caliphs. The migrating tribes devastated Cyrenaica around 1050, crushed the Zirids at the Battle of Haydaran in 1052, and sacked the great city of Kairouan in 1057, shattering the settled agrarian and urban order of the region. Estimated at up to roughly a million people over the century, the nomads spread across the high plains of Constantine and Algiers and eventually reached Morocco, displacing or absorbing Berber populations and converting cultivated land to pasture. The medieval historian Ibn Khaldun famously likened their impact to a swarm of locusts, blaming them for rural ruin. Over the following centuries this demographic influx became the single greatest driver of the linguistic, cultural, and genetic Arabisation of North Africa, embedding Bedouin Arabic dialects and tribal social structures that endure to the present.

Empires active in c. 1050 onward (11th century)

• Abbasid Caliphate
  750 CE – 1258 CE
• Song Dynasty
  960 CE – 1279 CE
• Byzantine Empire
  330 CE – 1453 CE
• Kanem-Bornu Empire
  700 CE – 1900 CE
• Toltec State (Tula)
  950 CE – 1168 CE
• Fatimid Caliphate
  909 CE – 1171 CE

Related social & demographic events

• Rise of Cahokia, the largest city of Mississippian North America
  c. 1050 CE
• The Black Death sweeps Europe, North Africa and the Middle East
  1347–1351 CE
• Zanj Rebellion against the Abbasid Caliphate
  869-883 CE
• Collapse of the Classic Maya lowland city-states
  c. 800–900 CE
• Siege of Kaffa and the spread of the Black Death along Mongol trade routes
  1346–1347 CE
• The Columbian Exchange and the demographic collapse of Indigenous America
  From 1493 (16th century)

Further reading

Sapiens: A Brief History of Humankind

The wider story

Sapiens: A Brief History of Humankind

Yuval Noah Harari

Global best-seller on how our species, its populations and societies remade the world.

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