Addis Ababa has finally inaugurated the long-awaited and much-touted GERD—Africa's biggest dam—leaving Egypt and Sudan worried about the impact on their water supply downstream

As Addis Ababa stands to benefit from electricity and revenues, it reassures downstream nations that the $4bn river barrier is an opportunity, not a threat. That's not the view from Cairo.

A deal to give Ethiopia commercial Red Sea access in return for its recognition of Somali territorial integrity has been brokered by Ankara to much acclaim. Where does that leave Egypt?

Tension in the Horn of Africa is not new, but the rivalry between Cairo and Addis Ababa has escalated, as Ethiopia forges ahead with projects that threaten Egypt's national security

Egypt is betting that its military presence near the Ethiopian border may succeed where diplomacy has failed

An Egyptian minister warns Ethiopia it will "pay" for any harm done to Egypt's water security, stoking speculation that the long-running clash over its GERD dam will spark a water war

Cairo is wooing states in the Nile Basin and Horn of Africa using its defence industry and security expertise to counter geopolitical worries over the Red Sea and the Suez Canal

Where once Middle Eastern states took little interest in this war-torn Arabic-speaking state on the Horn of Africa, today it is a key arena for Middle Eastern foreign policy and, at times, competition

Egypt is afraid that the new deal between Somaliland and Ethiopia will further destabilise maritime trade in the Red Sea