Ethiopia and Eritrea have severed diplomatic relations, northern Ethiopia is sliding back into major fighting and fears are growing that a new conflict could spill toward the Red Sea — potentially adding another layer of danger to the already troubled Bab el-Mandeb shipping corridor.
Ethiopia closed its embassy in Asmara on October 1 and ordered 10 Eritrean diplomats to leave within 48 hours, accusing Eritrea of “direct and indirect acts of hostility and belligerence” that posed a threat to Ethiopian national security.
Eritrea responded by severing diplomatic relations with Ethiopia, saying it had “no option but to reciprocate in kind.”
The diplomatic rupture came as Ethiopian federal forces and a coalition of armed groups led by the Tigray People’s Liberation Front (TPLF) fought for control of territory in northern Ethiopia.
The crisis is no longer confined to an Ethiopia-Eritrea dispute.
Ethiopia has accused Eritrea, Egypt and Sudan of supporting armed groups fighting the government. All three have rejected the accusations, while Sudan has made counter-allegations against Ethiopia.
At the same time, Ethiopia’s long-running dispute with Egypt over the Grand Ethiopian Renaissance Dam (GERD) remains unresolved, while Addis Ababa continues to emphasize the strategic importance of obtaining reliable access to the Red Sea.
That combination raises a bigger question:
Could the Horn of Africa become another pressure point around one of the world’s most important maritime chokepoints?
Ethiopia and Eritrea cut diplomatic ties
The latest crisis began with Ethiopia’s decision to close its embassy in Asmara.
Addis Ababa said the action was taken because of Eritrea’s alleged hostile activities and declared 10 Eritrean diplomats persona non grata.
Ethiopia nevertheless said it remained committed to peaceful coexistence and regional stability.
Eritrea responded within hours.
Its Foreign Ministry announced that it would sever diplomatic relations with Ethiopia and accused Addis Ababa of pursuing what it described as a continuing hostile agenda.
The diplomatic rupture represents a dramatic reversal from the historic rapprochement between the two countries in 2018.
From peace deal to diplomatic rupture
The deterioration is particularly striking because Ethiopia and Eritrea were once held up as an example of successful regional reconciliation.
When Abiy Ahmed became Ethiopia’s prime minister in 2018, he moved rapidly to end the two-decade “no war, no peace” confrontation with Eritrea.
The two governments restored diplomatic relations, reopened borders and re-established air and telecommunications links.
The breakthrough earned Abiy the 2019 Nobel Peace Prize, with the Norwegian Nobel Committee specifically citing his initiative to resolve the border conflict with Eritrea.
That peace, however, did not resolve the deeper strategic differences between the two countries.
The relationship deteriorated during and after the 2020-2022 Tigray war, when Eritrean forces fought alongside Ethiopian federal troops against the TPLF.
Eritrea was not a party to the 2022 Pretoria peace agreement that ended the war, and relations between Asmara and Addis Ababa subsequently deteriorated.
Fighting returns to Tigray
The diplomatic crisis is unfolding alongside the most serious fighting in northern Ethiopia since the Tigray war ended.
A new alliance led by the TPLF has been fighting Ethiopian federal forces and allied militias.
The renewed conflict began in September and has spread across parts of Tigray and neighboring areas.
Reuters reported on October 3 that Ethiopian government forces had recaptured Alula Aba Nega Airport in Mekelle, the capital of Tigray, after fighting with the rebel alliance.
The airport was among strategic locations seized by opposition forces during the renewed fighting.
The development does not mean the conflict is over.
Reuters reported that fighting continued around Mekelle, while Tigrayan forces were preparing for further resistance.
The return of large-scale fighting is particularly alarming because the previous Tigray conflict caused enormous civilian suffering and displacement.
Addis Ababa accuses Eritrea, Egypt and Sudan
Ethiopia’s military leadership has increasingly presented the conflict as part of a broader regional campaign against the government.
Army Chief Field Marshal Birhanu Jula has accused Eritrea of supporting the TPLF and has also alleged that Egypt and Sudan are backing armed groups fighting Addis Ababa.
Eritrea, Egypt and Sudan have rejected the allegations.
Sudan’s military has in turn accused Ethiopia of supporting or facilitating forces hostile to Khartoum.
The competing allegations are important because they transform what could otherwise be viewed as a domestic Ethiopian conflict into a potential regional proxy confrontation.
There is currently no independently established evidence proving all of Addis Ababa’s allegations.
That distinction matters.
But the accusations themselves are already affecting relations between the countries.
Egypt becomes part of the diplomatic crisis
Ethiopia’s dispute with Egypt is especially sensitive because it extends beyond the current fighting.
On October 1, Ethiopia also expelled an Egyptian diplomat.
Egypt responded by declaring an Ethiopian diplomat persona non grata.
The diplomatic confrontation comes after years of disagreement over the Grand Ethiopian Renaissance Dam, which Ethiopia built on the Blue Nile.
The dam was officially inaugurated in September 2025 after years of construction and controversy.
Ethiopia views the project as a major source of electricity and economic development.
Egypt regards the Nile as a vital national-security issue and has repeatedly demanded legally binding arrangements governing the dam’s operation, particularly during drought periods.
The GERD therefore remains one of the most important sources of tension between Addis Ababa and Cairo.
The Nile dispute and Red Sea access are now converging
The most important feature of the current crisis is that Ethiopia’s disputes with Egypt and Eritrea are no longer entirely separate.
One concerns water.
The other concerns maritime access.
Ethiopia is one of Africa’s largest landlocked states, having lost its coastline when Eritrea became independent in 1993.
More than 30 years later, access to the sea has become a major strategic issue for Addis Ababa.
Prime Minister Abiy Ahmed has repeatedly argued that Ethiopia needs reliable access to the Red Sea for its economic and strategic interests.
That has generated concern in Eritrea, particularly because one of the most strategically important ports on the Eritrean coast is Assab.
Why Assab matters
Assab sits on Eritrea’s Red Sea coastline and is strategically positioned close to the maritime routes connecting the Red Sea with the Gulf of Aden.
For Ethiopia, access to an Eritrean port could dramatically reduce its dependence on routes through neighboring Djibouti.
For Eritrea, however, Ethiopian demands for maritime access are viewed through the history of the two countries’ wars and Ethiopia’s previous control over Eritrean territory.
This is why seemingly economic discussions about ports and maritime access can quickly become national-security issues.
Ethiopia has not announced an imminent military operation against Assab.
But repeated Ethiopian statements about the strategic necessity of sea access have generated concern in Asmara and among regional analysts.
Ethiopia’s Djibouti dependence
Ethiopia currently relies heavily on neighboring Djibouti for international maritime trade.
That dependence gives Djibouti enormous economic and strategic importance.
It also creates a vulnerability for Ethiopia because most of its external trade must pass through a relatively narrow set of transport corridors connecting Addis Ababa to Djibouti’s ports.
A conflict or major disruption involving Ethiopia’s northern neighbors could therefore have consequences far beyond the battlefield.
It could affect trade routes, fuel supplies, food imports and Ethiopia’s wider economy.
This helps explain why Addis Ababa views alternative maritime access as a strategic issue rather than simply a commercial preference.
Are we heading toward another Red Sea chokepoint crisis?
This is where the Ethiopia-Eritrea confrontation intersects with the wider Red Sea security crisis.
The Bab el-Mandeb Strait connects the Red Sea with the Gulf of Aden and is one of the world’s critical maritime chokepoints.
The strait is already under pressure from the conflict in Yemen and Houthi attacks on shipping.
The European Union is maintaining a naval mission designed to protect commercial shipping, but Italy’s defence minister said on October 2 that the current contributions to the mission remain insufficient and called for more European participation.
A separate Reuters report said Saudi Arabia is preparing a major operation against the Houthis in Yemen aimed at restoring control around the Bab el-Mandeb area and improving maritime security.
The reported plan involves large Yemeni ground forces backed by Saudi airpower, although the final operation and its scope remain subject to developments.
That means the western side of the Red Sea is already highly militarized.
The Ethiopia-Eritrea crisis introduces another potential source of instability on the eastern African side of the same maritime system.
This is not yet a new maritime chokepoint
It is important not to overstate the situation.
The Ethiopia-Eritrea confrontation has not created a new chokepoint comparable to Bab el-Mandeb or the Strait of Hormuz.
Instead, the concern is that a military confrontation involving Eritrea’s Red Sea coastline could add another security crisis around an already vulnerable maritime corridor.
A conflict around Assab, Eritrean coastal installations or shipping routes could potentially force commercial vessels, insurers and naval forces to reassess risks.
That would be particularly serious if it coincided with renewed Houthi attacks from Yemen.
The result could be a Red Sea security problem involving pressure from both shores of the maritime corridor.
The geography makes the situation more dangerous
The Horn of Africa sits directly opposite Yemen.
Across the Red Sea, Eritrea and Djibouti face Yemen’s western coastline.
Further south lies the Bab el-Mandeb, connecting the Red Sea to the Gulf of Aden and the wider Indian Ocean.
That geography makes the region unusually sensitive.
A conflict inside Ethiopia could affect Eritrea.
A confrontation involving Eritrea could affect Red Sea security.
Instability around Yemen could threaten shipping from the opposite shore.
And disruption around Bab el-Mandeb could affect global trade far beyond Africa and the Middle East.
The overlapping geography is what makes the latest Ethiopian crisis more significant than a conventional border dispute.
Sudan adds another layer
Sudan’s civil war makes the situation even more complicated.
The war between the Sudanese Armed Forces and the Rapid Support Forces has continued for more than three years.
Both Ethiopia and Sudan have accused each other of supporting forces on the opposite side.
Sudan has alleged that Ethiopia has provided territory or facilities for military activity linked to the RSF.
Ethiopia rejects such allegations.
At the same time, Addis Ababa accuses Sudan of supporting armed groups operating against the Ethiopian government.
This creates a dangerous triangle involving Ethiopia, Sudan and Eritrea, with Egypt increasingly drawn into the diplomatic confrontation.
The Horn could become a proxy-war zone
The renewed Tigray conflict is still primarily an Ethiopian internal conflict.
But the risk of external involvement is growing.
Reuters reported that the current fighting is occurring against a background of shifting alliances across the Horn of Africa, including competing interests involving Eritrea, Sudan, Egypt and Gulf states.
The longer the fighting continues, the greater the possibility that outside powers will provide money, weapons, intelligence, political backing or logistical support to competing Ethiopian factions.
That would make the conflict much harder to contain.
It could also connect the Tigray battlefield to Sudan’s war and the wider Red Sea competition.
The GERD remains a strategic fault line
The Nile dispute should not be treated as a separate issue either.
The GERD was inaugurated in 2025 after Ethiopia invested around $5 billion in the massive hydropower project.
The dam is designed to generate more than 5,000 megawatts of electricity and has become a symbol of Ethiopia’s ambition for economic development and greater energy independence.
Egypt, however, remains concerned about the dam’s impact on downstream water flows, particularly during prolonged drought.
A binding agreement governing the dam’s filling and operation remains elusive.
That means Cairo and Addis Ababa already have a strategic dispute that predates the current crisis.
The latest accusations involving Tigray therefore add another layer to an already difficult relationship.
The 2018 peace architecture is collapsing
The biggest strategic concern is that the Horn of Africa is losing the diplomatic arrangements that helped contain previous conflicts.
The 2018 Ethiopia-Eritrea rapprochement was one of the most significant diplomatic breakthroughs in modern African politics.
But the peace process did not produce a durable settlement of the underlying security questions.
The Tigray war exposed those weaknesses.
The absence of Eritrea from the Pretoria peace process further complicated relations.
Now the two governments have formally broken diplomatic relations.
The sequence demonstrates how quickly a regional peace arrangement can unravel when unresolved territorial, military and economic interests remain underneath it.
Why the Red Sea should be watched closely
The Red Sea already has several simultaneous security pressures:
- Houthi military activity in Yemen
- Naval deployments by international powers
- Shipping-security operations
- The conflict in Sudan
- Competition involving Gulf states
- The Ethiopia-Eritrea confrontation
- Egypt’s concerns over the Nile and regional security
- Ethiopia’s demand for reliable maritime access
Any one of these crises could potentially be contained.
The danger comes from their interaction.
A renewed Ethiopia-Eritrea war would not automatically close the Red Sea.
But if military operations reach Eritrea’s coast while Houthi attacks continue around Yemen, the security calculations for commercial shipping could change dramatically.
Could Assab become the next strategic flashpoint?
Assab is likely to remain central to discussions about Ethiopia’s maritime ambitions.
The port has military and commercial significance and sits on Eritrea’s Red Sea coast.
For Ethiopia, gaining access to the sea would reduce dependence on Djibouti and give the country greater strategic freedom.
For Eritrea, protecting its sovereignty over its coastline is fundamental.
That makes Assab a potential flashpoint even if neither government wants a direct war.
Diplomatic pressure, border mobilization, military exercises or support for proxy forces could increase tensions without immediately producing an open interstate conflict.
The Red Sea’s two shores are becoming more interconnected
The emerging pattern is striking.
On one side of the Red Sea, Yemen’s Houthis remain capable of threatening shipping.
On the opposite side, Ethiopia and Eritrea are moving toward their most serious confrontation since the end of the last war.
At the same time, Sudan’s civil war is reshaping alliances along the western side of the Horn.
That means the Red Sea is increasingly surrounded by interconnected conflicts rather than a single isolated crisis.
This is why the Ethiopia-Eritrea rupture deserves attention from shipping companies, insurers, energy markets and naval planners.
What happens next?
The immediate priority is preventing the fighting in northern Ethiopia from turning into another full-scale Tigray war.
The African Union has urged restraint and called for peaceful dialogue.
But the situation is deteriorating rapidly.
Ethiopian forces are advancing toward Mekelle.
Eritrea and Ethiopia have severed diplomatic relations.
Egypt and Ethiopia have exchanged diplomatic expulsions.
Sudan and Ethiopia continue trading accusations.
And the question of Ethiopia’s access to the Red Sea remains unresolved.
There is still no evidence that Ethiopia has decided to launch a war against Eritrea or seize Assab.
Likewise, allegations that Eritrea, Egypt or Sudan are directing the renewed Tigray conflict remain disputed.
But the strategic ingredients for a wider crisis are accumulating.
The greatest danger may therefore not be a deliberate decision by one country to close the Red Sea.
It could be the interaction of several conflicts around the same maritime system.
The Yemen war has already demonstrated how a relatively small geographic chokepoint can disrupt global shipping.
A new Ethiopia-Eritrea conflict would not create another Bab el-Mandeb.
It could, however, create a second military crisis on the Red Sea’s African shore at precisely the moment when international naval forces are already struggling to secure the waterway.
The question is no longer simply whether Ethiopia and Eritrea will return to war. It is whether their confrontation becomes connected to the conflicts in Yemen, Sudan and the Nile — turning the Horn of Africa into another pressure point in the global struggle over critical maritime routes.
