Eastward and Southward
Barentu lines moved east into what became Hararghe, while other groups — particularly from the Borana line — settled Bale and neighboring southern regions.
Hararghe Expansion
Barentu-descended groups moved east into the region around Harar. They:
- Encountered the established Muslim Emirate of Harar
- Settled rural areas around the city
- Over generations, largely adopted Islam
- Integrated with Adare (Harari), Somali, and other groups
| Modern Hararghe Oromo Groups | |
|---|---|
| Ala | Western Hararghe |
| Babile | Mid-Hararghe |
| Nole | Nearby |
| Jarso | Regional group |
Bale Expansion
Borana-related groups moved south, reaching and settling:
- Bale (southeastern highlands and lowlands)
- Areas near Madda Walabu (the ancestral source)
- Southern pastoralist zones
Bale became home to both Oromo Muslim and Oromo Waaqeffataa communities, with significant overlap with neighboring Somali and Sidama populations.
Religion
Both regions saw complex religious encounters:
- Hararghe — largely Islamized over centuries
- Bale — mix of Waaqeffannaa, Islam, and local traditions
- Sheikh Hussein''s shrine in Bale became a pan-regional Islamic site
Culture and Dialect
The Afaan Oromoo dialects in Hararghe and Bale show distinct features, reflecting their separate paths and long contact with Semitic, Somali, and Sidama languages.
Trade
Both regions engaged in long-distance trade:
- Hararghe: routes to Harar, then the coast
- Bale: highland-lowland exchange, salt trade
Legacy
Today, Hararghe and Bale Oromo maintain distinctive identities within the broader Oromo nation, reflecting their specific historical trajectories since the 16th-century expansion.
Key takeaway: Oromo expansion eastward into Hararghe and south into Bale created distinctive regional Oromo communities with unique cultural and religious profiles.