Ethiopia is once again at war in the north.

After nearly four years of relative calm following the devastating 2020–2022 Tigray War, fighting between Ethiopia's federal forces and forces aligned with the Tigray People's Liberation Front (TPLF) has erupted again.

The renewed fighting began on September 22 and has spread across Tigray and into neighbouring Afar and Amhara. Human Rights Watch has warned that civilians face renewed danger because many of the abuses that characterized the previous war were never properly addressed.

But this time, the conflict is unfolding in a much more explosive regional environment.

Ethiopia is not simply fighting another internal rebellion.

It is simultaneously locked in serious disputes with Egypt over the Nile and the Grand Ethiopian Renaissance Dam, with Eritrea over Red Sea access and security, and with Sudan over accusations of supporting opposing forces in Sudan's civil war.

That is why the new Tigray war could become much bigger than Tigray.

Ethiopia's government points beyond its borders

Ethiopian military chief Field Marshal Birhanu Jula has accused Eritrea, Sudan and Egypt of supporting armed groups fighting the Ethiopian government.

According to the Ethiopian military, the opposition forces could not sustain their offensive without outside support.

The government has particularly focused on Eritrea, accusing it of acting as a link between external powers and Ethiopian armed groups.

Those accusations have been rejected.

Sudan's military called Ethiopia's allegations baseless and instead accused Addis Ababa of supporting the Rapid Support Forces (RSF) in Sudan's civil war.

Egypt has also rejected accusations of interference and says its policy respects Ethiopia's sovereignty and territorial integrity.

So it is important to separate what Ethiopia alleges from what has been independently established.

But the allegations themselves reveal how interconnected the region has become.

The Nile is sitting underneath the crisis

The most important regional dispute is arguably the confrontation between Ethiopia and Egypt over the Grand Ethiopian Renaissance Dam (GERD).

Ethiopia constructed the enormous dam on the Blue Nile with the objective of generating electricity and transforming its energy system.

Egypt sees the Nile very differently.

For Cairo, the river is an existential resource. Egypt receives most of its freshwater from the Nile and has long feared that Ethiopian control over the Blue Nile could threaten downstream water supplies.

The dispute has continued since Ethiopia began constructing the GERD in 2011.

The dam was officially inaugurated in September 2025, but the disagreement over its operation and the wider Nile system has not disappeared.

This is why Egypt's name inevitably appears whenever Ethiopia enters another major regional crisis.

Cairo has a strategic interest in preventing Ethiopia from becoming overwhelmingly dominant in the Horn of Africa and Nile Basin.

But that does not automatically prove that Egypt is supplying the TPLF.

At present, Ethiopia has made the accusation; Egypt denies it, and publicly available reporting has not established the allegation as fact.

Then there is Eritrea

Eritrea is perhaps the most complicated piece of the puzzle.

During the previous Tigray War, Eritrean forces fought alongside Ethiopian federal forces against the TPLF.

Thousands of Eritrean troops crossed into Tigray, and Eritrea became one of the most important military partners of Abiy Ahmed's government.

Today, that relationship has completely deteriorated.

One of the major sources of tension is Ethiopia's determination to obtain reliable access to the Red Sea.

Abiy has repeatedly emphasized Ethiopia's need for access to the sea, including discussion surrounding Eritrea's ports.

For Eritrea, this is a direct security concern.

Assab and Massawa are Eritrean ports.

Ethiopia is landlocked.

That combination creates an obvious strategic conflict.

A stronger Ethiopian military presence near Eritrea's coastline could fundamentally change the balance of power in the Red Sea.

And Eritrea has therefore emerged as one of Ethiopia's most important regional rivals.

Ethiopia now accuses Eritrea of helping the TPLF.

Eritrea denies the accusation and instead accuses Addis Ababa of destabilizing its neighbours.

And then there is Sudan

Sudan adds another layer of danger.

Sudan has been fighting a devastating civil war since April 2023 between the Sudanese Armed Forces (SAF) and the Rapid Support Forces.

The RSF emerged from the Janjaweed militias that became notorious during the Darfur conflict.

The organization has since become one of the most powerful armed forces in Sudan.

And Ethiopia and Sudan increasingly accuse each other of supporting forces on opposite sides of Sudan's war.

Sudan's military has accused Ethiopia of allowing its territory to be used for training, supplies and military operations connected to the RSF.

Ethiopia denies the accusations.

At the same time, Ethiopia views armed Tigrayan groups operating around the Sudanese border as a potential security threat.

This creates a dangerous triangle:

Ethiopia has problems with Tigray.

Sudan has problems with Ethiopia.

Sudan has its own war involving the RSF.

And the borders between these conflicts are becoming increasingly blurred.

The Janjaweed connection

The RSF's origins matter here.

The force grew out of the Janjaweed militia networks that operated in Darfur and were accused of some of the worst atrocities of Sudan's previous conflicts.

Today, the RSF is no longer simply a collection of local militias. It is a powerful paramilitary organization controlling large areas of Sudan.

Its war with the Sudanese army has attracted external involvement from several regional and international powers.

Research from the Center for Strategic and International Studies has documented extensive foreign involvement in Sudan's war, including accusations that the United Arab Emirates has supported the RSF, while Iran and other actors have supported the SAF.

That means the wider Horn of Africa is already operating inside a complicated network of competing alliances.

The renewed Tigray conflict is therefore arriving at precisely the wrong moment.

Seven armed groups against Abiy

The most significant development inside Ethiopia is that the TPLF is not operating completely alone.

The TPLF has joined a new alliance involving six other armed opposition groups.

The alliance includes the Oromo Liberation Army and the Amhara Fano movement, groups that have themselves been involved in conflicts with the Ethiopian government.

These organizations have historically had major disagreements with one another.

Yet they now share a common objective: removing Abiy Ahmed's government and establishing a transitional political arrangement.

That is potentially far more serious for Addis Ababa than another isolated Tigrayan rebellion.

The Ethiopian government could find itself fighting simultaneously in multiple regions.

And geography makes the situation particularly dangerous.

Tigray borders Eritrea.

Afar provides routes toward Djibouti and the Red Sea.

Amhara borders Sudan.

And the country's major transport corridors run through these areas.

The conflict is therefore occurring around some of Ethiopia's most strategically important territory.

The first battlefield gains are already changing

The renewed war has already produced significant territorial movement.

TPLF forces seized airports and advanced into neighbouring Afar.

They also captured the strategic town of Erebti.

But federal forces have begun pushing back.

Reuters reported that Ethiopian federal forces and allied militias captured Alamata, a strategically important town in southern Tigray, on September 28.

The fighting has also produced a new humanitarian emergency.

MSF reported a sharp increase in wounded people arriving at hospitals in northern Ethiopia, while humanitarian organizations have reported displacement.

Communications have also been disrupted across Tigray, making it increasingly difficult to independently verify developments on the ground.

And that is particularly worrying given what happened during the previous war.

The 2020–2022 conflict became one of Africa's deadliest recent wars.

Researchers at Ghent University estimated that approximately 500,000 people died, including deaths from violence, hunger and the collapse of health services.

A repeat would be catastrophic.

This is no longer just a Tigray problem

The most dangerous feature of the current conflict is therefore not simply the fighting itself.

It is the possibility of regionalization.

Imagine the different disputes being connected:

Tigray: TPLF versus the Ethiopian government.

Eritrea: hostile relationship with Addis Ababa and concern over Ethiopia's ambitions for Red Sea access.

Egypt: confrontation with Ethiopia over the Nile and GERD.

Sudan: civil war between the SAF and RSF, alongside worsening relations with Ethiopia.

Red Sea: competition over ports, trade routes and military access.

Suddenly, a conflict that began inside Ethiopia becomes connected to some of the biggest strategic disputes in northeastern Africa.

That is why the international community is increasingly worried.

The German Institute for International and Security Affairs warned months before the current fighting that the Tigray situation remained suspended between war and peace and that regional actors could become involved if tensions escalated. It specifically highlighted the connections involving Eritrea, Sudan, Egypt and Ethiopia's wider regional ambitions.

The dangerous question nobody can ignore

The central question now is whether the fighting remains an Ethiopian civil conflict or becomes a regional proxy war.

Ethiopia says outside enemies are supporting its opponents.

Sudan says Ethiopia is supporting its enemies.

Egypt denies involvement.

Eritrea denies supporting the TPLF.

Everyone accuses someone else.

And that is precisely how regional wars become difficult to stop.

The Horn of Africa already has Sudan's catastrophic civil war.

It already has instability in Somalia.

It already has disputes over the Red Sea.

It already has the unresolved Nile question.

And now Tigray is burning again.

The region does not need another war.

But the ingredients for one are increasingly visible.

The Nile dispute gives Egypt a strategic reason to watch Ethiopia closely.

The Red Sea gives Eritrea a strategic reason to resist Ethiopian expansion.

Sudan's civil war gives Addis Ababa and Khartoum competing security interests.

And Tigray gives all of these rivalries a potential battlefield inside Ethiopia.

For Abiy Ahmed, the challenge is therefore much larger than defeating the TPLF.

He has to prevent Ethiopia's internal conflict from becoming the meeting point for the Nile dispute, the Red Sea struggle and Sudan's civil war.

Because if those conflicts become interconnected, the next Tigray War could stop being an Ethiopian war altogether.

It could become a Horn of Africa war.