Ethiopia's Second Civil War Could Rewrite the Horn of Africa

The Airports Fall First

Ethiopian Airlines has suspended flights to three airports in Tigray. It sounds like an operational headache. It is not. It is a signal.

The Tigray People’s Liberation Front — the party that governed Ethiopia for twenty-seven years before Prime Minister Abiy Ahmed rose to power in 2018 — has seized control of the region’s federally run airports and launched what officials describe as an “all-out offensive” against government positions in the neighbouring Afar and Amhara regions. Flights grounded. Borders porous. A capital suddenly very far from the north.

Getachew Reda, an adviser to Abiy, called the move “irresponsible.” The Tigray regional government called it defensive, accusing federal troops of “intensive bombardments” with aircraft, drones and artillery on Tuesday. Both sides are telling stories that fit familiar patterns. Neither story explains what happens next.

A Rebellion Reconfigured

What makes this different from the 2020–2022 war is not just the violence — it is the architecture around it.

On Sunday, the TPLF announced it had allied with six other armed groups across Ethiopia in a coalition aimed at toppling Abiy’s government. Among them: Fano, the Amhara militia that fought alongside federal forces during the last war before turning against them in 2023. The alliance is a reversal of alignments that took a decade to harden. It is also, according to Reuters citing government and diplomatic sources, financially backed by Eritrea — Ethiopia’s historic adversary. Eritrea has denied the allegation.

If true, the Eritrean link transforms a domestic insurgency into a proxy flashpoint. If unproven, it remains a weapon of information warfare. Either way, it is already doing work.

President Taye Atske-Selassie Amde told the United Nations General Assembly that Ethiopia had shown “immense restraint” despite “foreign interference.” The phrasing was deliberate. So was the venue.

The Red Sea Equation

Here is what English-language coverage of Ethiopia rarely centres: position matters.

Ethiopia is landlocked since Eritrea’s independence in 1993, but it is the second-most-populous country in Africa, the largest recipient of foreign aid on the continent, and home to the African Union’s headquarters in Addis Ababa. It is also a critical actor along the Red Sea — the waterway through which roughly ten per cent of global trade passes. China has port investments in Djibouti, Somalia and Sudan. The United States maintains Camp Lemonnier in Djibouti. Saudi Arabia and the UAE have been expanding their footprint across the Horn. Eritrea itself received a unilateral US sanctions lift recently, cited as advancing “US regional interests.”

If Ethiopia fractures, the Red Sea corridor loses its interior anchor. A weakened Addis Ababa means less oversight of the Ertraean coastline, more space for rival powers to fill voids, and a humanitarian crisis that spills across borders already strained by conflict in Sudan and Yemen.

The Human Math

The 2020–2022 Tigray war killed an estimated 600,000 people, according to African Union figures — a number so high it broke the standard frameworks for counting war deaths. The Pretoria Peace Agreement ended the fighting but did not resolve the underlying tensions. About one million people remain displaced in the region. The infrastructure that survived the bombing — hospitals, roads, the airport network now grounded — was never fully rebuilt.

Clashes reported Wednesday in Afar towns including Abala and Erebti, and heavy weapons fire from a federal camp in Lalibela, Amhara, suggest the fighting has already spread beyond Tigray’s borders. Humanitarian workers confirm the violence is displacing people again. The UN has already flagged over 100,000 new displacements in Yemen; a second Ethiopian war would stretch an already broken response apparatus to breaking point.

Who Wins, Who Loses

The immediate losers are clear: civilians in Tigray, Afar and Amhara. Suppliers of humanitarian aid already operating on thin margins. The African Union’s credibility, which depends on keeping Ethiopia — its host — functional.

The longer-term calculus is messier. Abiy faces a rebellion that combines his old enemy (TPLF) with his current enemy (Fano) and a patron he cannot easily confront (Eritrea). If he cracks down hard, he risks repeating the tactics that ignited the last war. If he negotiates, he signals weakness to allies and adversaries alike.

For the TPLF and its allies, the gamble is that the coalition can exploit fissures in the federal military before international pressure forces a ceiling on the fighting. Their risk is that Eritrean involvement draws Addis Ababa’s full wrath — and possibly Egyptian or Sudanese backing for the federal side.

The Regional Domino Risk

Alan Boswell of the International Crisis Group warned that allegations of Eritrean backing — if substantiated — could trigger a wider regional conflict. The chain is fragile but real: Eritrea is closely linked to the Sudanese army, and Ethiopia’s relations with Khartoum’s military are already deteriorating. Ethiopia is also increasingly involved along the Sudan border. What begins as a northern Ethiopian insurgency could pull Sudan deeper into a conflict it is barely surviving.

The alternative — de-escalation — requires a framework that does not currently exist. The Pretoria agreement collapsed because its implementations were never trusted. A new ceasefire would need enforcement mechanisms, not just signatures.

What Happens Next

In the short term, expect Ethiopian Airlines to keep northern routes grounded. Expect the TPLF to test whether the federal military can hold the ground it gained during the last war. Expect Eritrea to watch carefully from its border.

In the medium term, the question is whether Addis Ababa holds. Ethiopia’s economy, already fragile, cannot absorb another war. Its currency is under pressure. Food insecurity is widespread. A collapse would send refugee flows toward Kenya, Sudan and Djibouti — each of which is managing its own crises.

The world watched Ethiopia’s last war with a mixture of horror and detachment. This time, the geographic and geopolitical stakes are higher. The Red Sea is not just a trade route. It is a fault line. And Ethiopia sits on top of it.