The Peace That Shocked Africa: Why Eritrea and Ethiopia Reconciled in 2018 and Fell Apart Again

In 2018, Ethiopia and Eritrea did something that had seemed almost impossible: after two decades of hostility, the former enemies declared their state of war over, restored diplomatic relations, reopened their border and resumed transport, trade and communications links. Prime Minister Abiy Ahmed and Eritrean President Isaias Afwerki moved with extraordinary speed, turning one of Africa’s most entrenched interstate confrontations into a public display of reconciliation. The breakthrough was internationally celebrated, and Abiy was awarded the 2019 Nobel Peace Prize in large part for his efforts to make peace with Eritrea.

But the 2018 rapprochement was less a completed peace settlement than a dramatic political realignment. It removed the immediate Ethiopia-Eritrea confrontation, but left difficult questions unresolved: the practical implementation of the border ruling, the future of economic relations, the political relationship between Addis Ababa and the Tigray People’s Liberation Front (TPLF), Eritrea’s security concerns and Ethiopia’s growing interest in Red Sea access. When the Tigray War began in 2020, Eritrea and Ethiopia found themselves fighting on the same side against the TPLF. After that war ended in 2022, their interests diverged again. By October 2026, the rapprochement had collapsed so far that Eritrea had severed diplomatic ties with Ethiopia amid renewed fighting in northern Ethiopia.

Why the 2018 peace was so extraordinary

To understand the shock of 2018, it is necessary to understand what came before it.

Eritrea and Ethiopia fought a major war from 1998 to 2000 over their disputed border. The conflict killed tens of thousands of people and displaced large numbers of civilians. The Algiers Agreement of December 2000 formally ended the war and established mechanisms for resolving the border dispute. But the peace process did not produce normalization.

The boundary commission established under the agreement eventually issued its delimitation decision, but Ethiopia did not immediately implement the ruling. The border remained militarized, diplomatic relations stayed frozen and the two governments supported opposing political and armed actors in the wider Horn of Africa.

For almost two decades, Ethiopia and Eritrea were therefore neither formally at war nor genuinely at peace.

That condition became known as a “no war, no peace” situation.

The significance of 2018 was that Abiy’s government decided to break it.

Abiy Ahmed’s unexpected offer

Abiy became Ethiopia’s prime minister in April 2018 following years of political unrest and a leadership transition inside the ruling EPRDF coalition.

One of his most consequential foreign-policy decisions came only months later.

In June 2018, Ethiopia announced that it would accept and implement the Eritrea-Ethiopia Boundary Commission’s decision under the 2000 peace agreement. That effectively opened the way to a settlement of the territorial dispute that had helped sustain the military standoff. The African Union explicitly welcomed Ethiopia’s commitment and Eritrea’s decision to send a delegation to Addis Ababa.

For Eritrean President Isaias Afwerki, the announcement created an opportunity that previous Ethiopian governments had resisted.

The result was remarkably rapid diplomacy.

Abiy and Isaias met in Asmara in July 2018. On July 9, they signed the Joint Declaration of Peace and Friendship, declaring the state of war over and committing the two governments to renewed political, economic, social, cultural and security cooperation. The declaration specifically promised the resumption of transport, trade and communications links and the restoration of diplomatic relations.

What changed in 2018?

The changes were not merely symbolic.

In September 2018, the two governments reopened border crossings at Bure and Serha-Zalambessa for the first time in approximately 20 years. Flights and telephone connections had already resumed, and Eritrea had indicated that its ports could become available to Ethiopia’s landlocked economy.

For families divided by the conflict, the impact was immediate.

People who had spent years unable to cross the border could suddenly see relatives again.

For businesses, the reopening raised the possibility of rebuilding trade routes that had disappeared after the war.

For the wider Horn of Africa, it suggested that a major source of regional tension might finally be disappearing.

Why Isaias Afwerki agreed

The peace was not simply a gift from Abiy to Eritrea.

Isaias had strategic reasons to accept it.

For years, Eritrea’s security policy had been shaped by its confrontation with Ethiopia and its fear of renewed Ethiopian military pressure. A formal settlement could reduce that immediate threat.

Normalization could also open diplomatic and economic opportunities for Eritrea.

Most importantly, Ethiopia’s acceptance of the boundary commission’s ruling addressed one of Asmara’s central demands.

The peace declaration explicitly committed both governments to implementing the boundary decision.

The symbolism was powerful.

Isaias and Abiy represented governments that had previously been separated by trenches, minefields and heavily armed borders.

Now they were appearing together at ceremonies celebrating peace.

The African Union described the development as an opportunity for a new chapter of cooperation and good-neighborliness, emphasizing the potential consequences for peace, security and development across the Horn of Africa.

Why Abiy wanted peace with Eritrea

Abiy also had strong reasons to pursue reconciliation.

First, the Ethiopia-Eritrea confrontation consumed enormous security resources.

Second, peace with Eritrea could reduce the risk of another interstate war while Abiy attempted to reform Ethiopia internally.

Third, reopening the northern corridor potentially offered Ethiopia an alternative to its heavy dependence on Djibouti for maritime commerce.

Ethiopia had been landlocked since Eritrea’s independence in 1993. Access to Eritrean ports such as Assab and Massawa had therefore acquired both economic and strategic importance.

But the 2018 settlement did not resolve the maritime question.

It created an opening for economic cooperation without establishing a durable, detailed framework for how Ethiopia would use Eritrean ports.

That distinction would become important later.

The peace changed the regional balance

The Ethiopia-Eritrea reconciliation also altered the politics of the Horn of Africa.

The most consequential consequence was its effect on the TPLF.

For decades, the TPLF had been the dominant force inside Ethiopia’s ruling EPRDF coalition.

The TPLF and Eritrea had also once been allies against the Derg before becoming bitter enemies during and after the 1998–2000 war.

Abiy’s rapprochement with Isaias therefore changed the strategic geometry.

The former Ethiopian government that had fought Eritrea for 20 years was now making peace with Eritrea.

Meanwhile, relations between Abiy’s federal government and the TPLF were deteriorating.

The reversal became even more dramatic during the Tigray War.

The alliance that emerged in 2020

By 2020, the political relationship between Abiy’s government and the TPLF had deteriorated into open conflict.

In November that year, fighting erupted between Ethiopia’s federal government and Tigrayan forces.

Eritrea intervened militarily on the side of the Ethiopian federal government.

This produced one of the most extraordinary reversals in the Horn of Africa’s modern political history.

The EPLF and TPLF had once fought side by side against Ethiopia’s Derg government.

By 2020, Eritrea’s military was fighting against the TPLF inside Tigray, alongside the Ethiopian federal forces.

The 2018 peace had therefore done more than end an old interstate conflict.

It had created a new strategic partnership.

Human Rights Watch documented serious abuses by Eritrean forces during the Tigray War, including killings, sexual violence and pillage, while also documenting abuses by other forces involved in the conflict.

This is where the limitations of the 2018 rapprochement became apparent.

The agreement had reconciled Eritrea and Ethiopia as states.

It had not resolved the much broader political conflict involving the TPLF and the Ethiopian federal system.

Why the Tigray War changed the meaning of the peace

From Asmara’s perspective, the TPLF remained a deeply significant security concern.

From Addis Ababa’s perspective, Eritrean military support became valuable during the war.

For a period, their interests aligned.

But the arrangement was inherently conditional.

Once the TPLF was militarily weakened and a peace agreement became possible, Ethiopia and Eritrea no longer necessarily needed each other in the same way.

That distinction is crucial.

The 2018 rapprochement was built partly around a shared strategic transformation. It did not create identical long-term interests.

The two governments could cooperate against a common adversary without agreeing on what the Horn of Africa should look like afterward.

Pretoria changed the equation again

In November 2022, the Ethiopian government and the TPLF signed the Pretoria Cessation of Hostilities Agreement, ending the large-scale Tigray War.

The agreement was negotiated under African Union auspices and provided a framework for ending hostilities, restoring humanitarian access and addressing the disarmament of Tigrayan forces.

But Eritrea was not a party to the agreement.

That mattered.

Ethiopia now had a formal peace process with the TPLF, while Eritrea remained outside it.

The strategic relationship that had developed during the war therefore became more complicated.

The peace agreement also left difficult questions about disputed territories, displaced populations and the presence of Eritrean forces in Tigray.

The end of the war did not mean that the security interests of Addis Ababa and Asmara had become identical again.

The maritime question returned

One of the biggest differences between the 2018 period and the years that followed was Ethiopia’s increasingly explicit emphasis on Red Sea access.

The economic logic is straightforward.

Ethiopia is one of Africa’s largest landlocked countries and relies heavily on external maritime corridors, particularly through Djibouti.

For Addis Ababa, diversification makes economic sense.

But Eritrea’s coastline is also one of its most important strategic assets.

This created a new source of tension between the two governments.

Ethiopia’s argument has generally been that its economic and geographic circumstances justify reliable access to the Red Sea through peaceful negotiation.

Eritrea has been concerned that Ethiopian demands could eventually go beyond commercial access and threaten Eritrean sovereignty.

By 2026, this issue had become one of the major sources of tension between the former partners. Reuters reported that Ethiopia’s repeated emphasis on sea access had contributed to the deterioration of relations, while Eritrea feared Ethiopia could seek control of the Assab port. Ethiopia has said it seeks access through peaceful means.

The distinction between access and ownership is therefore essential.

Ethiopia does not need sovereign territory in Eritrea to obtain commercial use of an Eritrean port.

But any arrangement involving long-term leases, military facilities or exclusive control could carry much greater strategic implications.

Why the reopening did not become permanent integration

The spectacular speed of the 2018 reopening created an impression that political normalization would naturally lead to deeper economic integration.

That did not happen on the same scale.

Several structural obstacles remained.

The border was reopened, but the political relationship remained highly personalized

Much of the rapprochement was driven directly by Abiy and Isaias.

The two leaders met repeatedly and made highly visible gestures of friendship.

That created momentum, but it also meant that the process depended heavily on the continued alignment of two governments.

A durable peace normally requires institutions capable of surviving political disagreements.

The 2018 declaration provided a framework for cooperation, but implementation of that framework was not sufficiently developed to eliminate every future dispute.

Economic normalization remained limited

Reopening a border is not the same as creating an integrated economic corridor.

Businesses need predictable customs rules, banking arrangements, insurance, transportation infrastructure, contracts, property protections and confidence that political relations will remain stable.

The two countries did not build a sufficiently deep economic interdependence to make renewed confrontation prohibitively costly.

The TPLF question remained unresolved

The 2018 peace changed Eritrea’s relationship with Ethiopia, but it did not settle the relationship between Eritrea and the TPLF.

That unresolved rivalry became central once the Tigray War began.

Ethiopia’s domestic political transition remained unstable

Abiy inherited a deeply complicated federal system and a country experiencing major political tensions.

The federal government’s relationship with regional political forces became increasingly contentious.

The TPLF was not the only source of tension.

Ethiopia’s broader political transition was generating conflicts over identity, federalism, territorial control and political power.

The Eritrea peace agreement could not solve those domestic problems.

The Nobel Prize and the expectations of 2019

The international response to the 2018 peace was enormous.

In October 2019, Abiy was awarded the Nobel Peace Prize for his efforts to achieve peace and international cooperation, particularly his initiative to resolve the conflict with Eritrea.

The award reflected the genuine significance of what had happened.

But it also created a historical paradox.

The same peace process that generated extraordinary international optimism was followed only a year later by a major war in which Eritrean forces and Ethiopian federal forces fought against the TPLF.

The Nobel Prize did not become meaningless because the subsequent peace deteriorated.

Rather, the episode illustrates an important distinction between ending one conflict and creating a durable regional peace.

The 2018 agreement solved one major interstate confrontation.

It did not solve every conflict involving the same actors.

Why the rapprochement ultimately collapsed

The breakdown was gradual rather than caused by one event.

Several forces pushed the relationship in different directions.

The first was the Tigray War. Eritrea’s intervention brought the two governments into close military cooperation, but it also created disagreements over the postwar settlement.

The second was the unresolved Eritrea-Tigray relationship. Ethiopia’s federal peace process with the TPLF did not automatically satisfy Eritrea’s security concerns.

The third was Ethiopia’s Red Sea strategy. Addis Ababa increasingly treated maritime access as a national economic and strategic priority, while Asmara viewed its coastline as a core sovereign asset.

The fourth was the erosion of political trust. Once the common wartime alignment weakened, old strategic differences became more visible.

The fifth was the return of military tensions in northern Ethiopia. By 2026, the relationship had moved far beyond the cautious disagreements of the post-Pretoria period.

The 2026 rupture

The deterioration reached a new stage in October 2026.

Ethiopia closed its embassy in Asmara and expelled 10 Eritrean diplomats, accusing Eritrea of direct and indirect hostile actions and of supporting an opposition alliance led by the TPLF.

Eritrea responded by severing diplomatic ties with Ethiopia and closing its embassy in Addis Ababa. Eritrea denied supporting the opposition alliance.

The timing was especially serious because fighting had again erupted in northern Ethiopia.

Reuters reported that clashes in Tigray had escalated sharply, with airstrikes and artillery fire reported in several areas. Ethiopia accused Eritrea, Sudan and Egypt of supporting forces opposed to the federal government; the countries denied the allegations.

This means the collapse of the 2018 rapprochement is no longer merely a diplomatic story.

It has become part of a wider regional security crisis.

From peace partners to opposing camps

The sequence is striking:

1998–2000: Ethiopia and Eritrea fight a major interstate war.

2000–2017: A formal peace agreement exists, but the border remains militarized and relations stay hostile.

2018: Abiy accepts implementation of the boundary decision; diplomatic relations are restored; borders, flights and communications reopen.

2019: Abiy receives the Nobel Peace Prize.

2020–2022: Eritrea and Ethiopia fight together against the TPLF during the Tigray War.

November 2022: Ethiopia and the TPLF sign the Pretoria agreement; Eritrea is not a party.

2023–2025: Relations between Addis Ababa and Asmara increasingly deteriorate amid disputes involving Tigray, security and Ethiopia’s maritime ambitions.

October 2026: Ethiopia closes its embassy in Eritrea and expels Eritrean diplomats; Eritrea severs diplomatic relations as fighting again intensifies in northern Ethiopia.

The pattern reveals something important.

The 2018 peace did not fail because reconciliation was inherently impossible.

It failed to become a comprehensive regional settlement.

What the 2018 experience teaches about peace in the Horn of Africa

The Ethiopia-Eritrea case demonstrates why diplomatic normalization can be both transformative and fragile.

A peace agreement can remove troops from a border.

It can reopen roads.

It can reconnect telephone lines.

It can reunite families.

It can restore diplomatic relations after decades of hostility.

But those achievements do not automatically settle questions about political power, territorial claims, military alliances or economic strategy.

The most difficult problems often emerge after the celebration.

In 2018, the immediate question was whether Ethiopia and Eritrea could stop treating each other as enemies.

They did.

The harder question was what each country would want from the other once the old confrontation had disappeared.

That question remained unanswered.

The unresolved question behind the next crisis

The 2018 reconciliation is therefore best understood neither as a permanent success nor as a meaningless episode.

It was a genuine and extraordinary diplomatic breakthrough.

It ended a 20-year confrontation, reopened a closed border and created a period of cooperation that would have been difficult to imagine only months earlier.

But the rapprochement rested on foundations that proved insufficiently durable.

Eritrea wanted security, recognition of its sovereignty and implementation of the border settlement.

Ethiopia wanted peace on its northern frontier, regional stability and eventually greater economic and strategic freedom.

The TPLF remained an unresolved factor in both countries’ calculations.

And Ethiopia’s renewed search for Red Sea access introduced another strategic issue that the 2018 peace had never fully addressed.

That is why the story did not end with Abiy and Isaias embracing at the border.

The deeper test of the 2018 peace was whether Ethiopia and Eritrea could build a relationship based on institutions and mutually accepted interests rather than on the temporary alignment of leaders and threats. As of October 2026, that test has not been passed: diplomatic ties have been severed, northern Ethiopia is again experiencing serious fighting, and the old triangle of Ethiopia, Eritrea and Tigray has re-emerged in a substantially more dangerous form. The central question now is not whether the two countries can reconcile once—they already demonstrated that they can—but whether they can construct a settlement durable enough to survive their next strategic disagreement.