Ethiopia and Eritrea sever ties in 2026 — the Tigray war threatens the entire Horn of Africa

In Milazat, about twenty kilometers southeast of Mekelle, the war is now measured in kilometers before it is measured in statements. A pro-government militia claims to have taken this locality, while Ethiopian federal forces are fighting the Tigray People's Liberation Front (TPLF) and its allies in Tigray, Afar, and Amhara. The BBC has not been able to verify this claim. But the operational signal is clear: the front lines are closing in on the regional capital, and the crisis has just crossed the diplomatic border.

On October 1, Addis Ababa closed its embassy in Asmara and expelled ten Eritrean diplomats within forty-eight hours, accusing them of activities threatening national security. Eritrea responded by severing diplomatic relations. At the same time, explosions were heard near the Ethiopian military headquarters in the capital. These events do not prove Eritrean involvement in the fighting, but they show that the relationship between the two former allies has entered a phase of open confrontation.

The front near Mekelle is closing in

The government of Prime Minister Abiy Ahmed claims that Tigrayan fighters initiated the latest hostilities after seizing airports administered by the federal government. Tigray authorities, on the other hand, assert that they are responding to a federal offensive accompanied by drone strikes. The two narratives are incompatible, and the cut communications make any verification slow and fragmentary.

Available evidence, however, indicates increasing military pressure in southern Tigray. A doctor in Alamata reported at least 52 civilians killed in three days of intense fighting. In neighboring Afar, clashes threaten the road corridor that connects Ethiopia to Djibouti and the Red Sea. Tens of thousands of people are said to have fled their homes. For an army, this corridor is a logistical artery; for civilians, it is the route to markets, healthcare, and humanitarian aid.

The TPLF is no longer isolated. Last month, it joined six other armed movements, including the Amhara Fano militia, in a coalition that aims to overthrow Abiy's government. This alliance remains politically disparate, and its cohesion in combat is not demonstrated. However, it is enough to multiply the axes of crisis. The theater is no longer limited to historical Tigray: it affects the roads of Afar and the contested areas of Amhara.

Asmara and Addis Ababa on the brink of no return

The Ethiopian accusation against Eritrea concerns support for the new rebel alliance. Asmara denies it. A pro-government commander told the BBC that Eritrean soldiers were present on the front lines, but this claim has not been independently verified. Eritrea did indeed fight alongside federal forces during the 2020-2022 war against the TPLF. Yesterday's alliance has thus become a source of military suspicion today.

The central issue is access to the Red Sea. Ethiopia lost its coastline with Eritrea's independence in 1993. Abiy presents access to a port as a long-term economic and security necessity. Asmara interprets this claim as a direct threat to its sovereignty. As long as this issue remained diplomatic, it could be contained. With troops, drones, and rebel forces around Tigray, it becomes a military calculation.

The rupture also highlights the fragility of the 2018 peace. The reopening of the border and the rapprochement between Abiy and Isaias Afwerki ended two decades of hostility and earned the Ethiopian leader the Nobel Peace Prize in 2019. However, the agreement did not resolve the issues of borders, ports, or security guarantees. It suspended the dispute, but did not eliminate its causes.

Egypt and Djibouti in the same equation

Addis Ababa also expelled an Egyptian diplomat, while Cairo ordered the departure of an Ethiopian embassy official. The dispute over the Grand Ethiopian Renaissance Dam on the Nile explains part of this escalation. Egypt is heavily dependent on the river and fears that the management of the dam will reduce its share of water. An Ethiopia engaged simultaneously in Tigray, against Eritrea, and on the Nile issue must therefore monitor multiple strategic fronts.

Djibouti is exposed in a different way. Its corridor concentrates Ethiopian supply and a large part of the country's foreign trade. If fighting spreads to Afar, an attack on the roads or depots can produce a strategic effect without any army officially crossing a border. This is the logic of control zones: one does not necessarily conquer a capital, one cuts the road that feeds it.

A regional war is not yet inevitable

The African Union has called on Ethiopia, Eritrea, and Egypt to exercise restraint. The UN warns that drones and airstrikes endanger civilians, infrastructure, and aid operations. These calls are necessary, but they do not stop a column on a road or a strike prepared from an airfield. The immediate operational priority is to preserve humanitarian corridors and prevent unverified accusations from becoming mobilization decisions.

The 2020-2022 war is estimated to have caused around 600,000 deaths, according to an estimate cited by an African Union mediator. Tigray cannot absorb a second conflict of this magnitude. The uncertainty remains considerable: cut communications, limited journalistic access, and contradictory claims. But the evolution is already clear enough to alert neighboring military headquarters. If federal forces reach the outskirts of Mekelle, or if Eritrean units are confirmed in the battle, the crisis will change category. The next battle may not take place in the city, but on the roads of Afar and towards Djibouti. It is there that the Horn of Africa will discover whether the diplomatic rupture remains a warning or becomes the prelude to a regional war.

Sources

• BBC News — Ethiopia and Eritrea cut diplomatic ties as Tigray conflict escalates
• Reuters — analyses of the renewal of fighting in Tigray and the risk of regional conflict, October 2, 2026
• Al Jazeera — coverage of the advance of pro-government forces in Tigray, October 2, 2026
• African Union and United Nations — calls for restraint and alerts on humanitarian access, October 2026