Somali expansion was uncoordinated clan movements, not a single directed conquest

Evidence

Finally, in considering the character of the Somali expansion, it should be remembered that this was not a concerted operation under a single direction: it was a disjointed series of clan and lineage movements in which there were many cross-currents of migration as group jostled group in the search for new pastures. Nor does this sequence of Somali and Oromo movement exclude the possibility that the ultimate origins of both peoples may be traced to the same area on the upper reaches of the Juba river. — I.M. Lewis, I. M. Lewis, A Modern History of the Somali_ Nation…, 115

Categorization

• QUESTION: The common-origin hypothesis for Somali and Oromo on the upper Juba is intriguing — worth chasing in Lewis’s earlier discussion.
• XREF: connects to: Somali expansion triumphed by numerical superiority and military dynamism, not technology.; Somali expansion proceeded as disjointed clan migrations, not a unified campaign.; Numerical superiority, not weaponry, drove Somali conquest of Oromo territory (+4 more)

Related

• Somali expansion proceeded as disjointed clan migrations, not a unified campaign. (similarity 0.89)
• Somali expansion triumphed by numerical superiority and military dynamism, not technology. (similarity 0.86)
• Numerical superiority, not weaponry, drove Somali conquest of Oromo territory (similarity 0.84)
• Somali migrations disestablished the Oromo from northern Somaliland by the twelfth century (similarity 0.83)
• Somali migrants accepted Oromo protection only until strong enough to overthrow them (similarity 0.82)
• Somali expansion displaced Oromo and Bantu peoples through war (similarity 0.82)
• Somali clan expansion reflects real migrations though founding patriarchs are legendary (similarity 0.81)
• Somali migrations shaped clan identity through cultural borrowing from Oromo and Bantu (similarity 0.81)
• Somali conquered via numeric superiority and momentum, not superior weaponry (similarity 0.81)
• The Somali southward dispersal is among Northeast Africa’s most sustained population movements (similarity 0.80)
• Somali and Oromo share an Ethiopian highland origin from which proto-Somali expanded east (similarity 0.80)
• Somali clans rarely united; Gran’s leadership was exceptional. (similarity 0.80)
• Oromo lost all their Somaliland territory north of the Juba by 1700 (similarity 0.79)
• Northern Somali clans reached their present distribution by 1700. (similarity 0.79)
• Darod clans crossed the Juba as clients and allies of the Oromo (similarity 0.79)