Since all this are neighbouring tribes, I think their conflicts is purely based on Scarce resources. if there was enough food, water, and land, there would have been no rivaltry between this tribes.
Mareexaan VS Majeerteen
Isaaq Vs Dhulbahante
Sacad Vs Cumar Maxamuud
Saleebaan Vs Sacad
Saleebaan vs Qubays
Saleebaan vs Wagardhac
Habar Jeclo vs Habar Yoonis
Habar Gidir Vs Abgaal
Gaaljecel Vs Xawaadle
Ogaadeen Vs Mareexaan