The diplomatic scaffolding holding the Horn of Africa together just collapsed in 48 hours. Ethiopia ordered its embassy in Eritrea closed, expelled ten Eritrean diplomats, and declared an Egyptian diplomat persona non grata. Eritrea severed ties entirely. Egypt expelled an Ethiopian counsellor. Eritrea's information minister called it a "declaration of war." This is not a bilateral spat — it is the unraveling of every major relationship Addis Ababa maintains simultaneously. The proximate cause is the renewed fighting between Ethiopian federal forces and an opposition alliance led by the Tigray People's Liberation Front (TPLF), which killed hundreds of thousands between 2020 and 2022. Tigrayan forces have claimed victory over the towns of Abala and Erebti in Afar region. Addis Ababa accuses Eritrea of backing the rebel alliance across Tigray, Amhara, and Afar — a charge Asmara denies while reportedly providing rebel forces access to its Red Sea coastline, giving a lifeline to otherwise isolated Tigray. The Ethiopia-Eritrea rupture is especially striking. Only eight years ago, Prime Minister Abiy Ahmed reopened his embassy in Asmara as part of a rapprochement that earned him the 2019 Nobel Peace Prize. Eritrea fought alongside Ethiopian forces in the 2020-2022 Tigray war. Now they are on opposing sides. The deeper structural driver: Ethiopia, landlocked since Eritrea's independence in 1993, has been pushing for Red Sea access that Eritrea treats as an existential threat. Egypt's involvement adds a second axis of confrontation. Cairo and Addis have clashed for over a decade over the Grand Ethiopian Renaissance Dam (GERD), which Egypt argues threatens downstream Nile flows. Ethiopia now accuses both Egypt and Sudan of supporting the opposition alliance — charges both reject. The diplomatic expulsions formalize a hostility that has been building independently of the Tigray fighting. The regional entanglement runs deeper still. Sudan's civil war between the army and the Rapid Support Forces has created its own web of accusations — Khartoum claims Ethiopia supports the RSF, including hosting militia training camps. Ethiopia is reportedly preparing to withdraw more than 3,000 troops from Somalia, where they have been fighting al-Shabab, to redeploy them to northern fronts. Gulf powers including the UAE and Saudi Arabia continue vying for influence with unconfirmed reports of backing various players. Overnight explosions in Addis Ababa, allegedly caused by drones and confirmed by diplomatic sources, represent a potential inflection point. Anti-government groups have never demonstrated the ability to strike the capital with drones while fighting hundreds of kilometers away. The Ethiopian government has not confirmed the reports but banned drone flights over the capital — an implicit acknowledgment. The African Union is calling for restraint, and African leaders are gathering in Cairo for the Egypt-Africa Summit. But no major actor from within or outside the region has stepped forward to broker talks. The Amhara Region President Arega Kebede told DW that "no matter how much justification is presented, the ongoing bloodshed cannot be a sustainable answer to the region's problems." He is correct. But nobody with the power to stop it is listening.
