War Outbreak of hostilities (May 1998) After a series of armed incidents in which several Eritrean officials were killed near Badme, on 6 May 1998, a large Eritrean mechanized force entered the Badme region along the border of Eritrea and Ethiopia's northern
Tigray Region, resulting in a firefight between the Eritrean soldiers and a Tigrayan militia and Ethiopian police they encountered. Accounts differ on who initiated the conflict. Eritrea claimed the war began with an unprovoked attack by Ethiopian forces on Eritrean positions, while Ethiopia accused Eritrea of invading and occupying disputed border areas. What followed was characterized by observers as the most intense fighting in Africa since
World War II. These raids caused civilian casualties and deaths on both sides of the border. The United Nations Security Council adopted
Resolution 1177 condemning the use of force and welcomed statements from both sides to end the air strikes.
Stalemate and military buildup (Mid-1998 – February 1999) Both countries spent several hundred million dollars on new military equipment. This was despite the peace mediation efforts by the
Organization of African Unity (OAU) and a US/Rwanda peace plan that was in the works. The US/Rwanda proposal was a four-point peace plan that called for withdrawal of both forces to pre-June 1998 positions. Eritrea refused and instead demanded the demilitarization of all disputed areas along the common border, to be overseen by a neutral monitoring force, and direct talks. In 1999, the war entered a new phase as Ethiopia had fully mobilized its reserves and replenished its arsenal. Eritrea also called up its reserves—one-fifth of whom were women—but relied primarily on weapons it had captured years prior during the war of independence. Surveying the extensive trenches the Eritreans had constructed, Ethiopian General
Samora Yunis observed, "The Eritreans are good at digging trenches and we are good at converting trenches into graves. They, too, know this. We know each other very well". Ethiopia's offensive, codenamed Operation Sunset, began with an air attack on
Assab airport by four Ethiopian fighter jets, followed by a massive artillery barrage against Eritrean positions on the
Tsorona front, which was meant as a diversion to make the Eritreans prepare for an Ethiopian offensive against eastern or southern Eritrea. The following day, the Ethiopian ground attack began. Three Ethiopian divisions broke through the Eritrean defenses in the Biyukundi area and then advanced toward Dukambiya, 20 kilometers southeast of
Barentu, before turning east and hitting an Eritrean division north of Badme in the flank, taking the Eritreans by surprise. The Eritrean division was almost totally destroyed, and the Ethiopians continued their advance toward Dukambiya. Realizing that they were about to be cut off, the remaining Eritrean units deployed in the
Badme area hastily retreated, abandoning nearly 100 kilometers of fortifications and most of their heavy weapons. Ethiopian
Mi-24 helicopter gunships attacked the fleeing Eritreans with rockets. After five days of heavy fighting, Ethiopian forces were 10 kilometers (six miles) deep into Eritrean territory. Eritrea accepted the OAU peace plan on 27 February 1999. While both states said that they accepted the OAU peace plan, Ethiopia did not immediately stop its advance, because it demanded that peace talks be contingent on an Eritrean withdrawal from territory occupied since the first outbreak of fighting. Operation Sunset was a
pyrrhic victory for the Ethiopians, and independent observers estimated that 30,000 men had died on both sides during the offensive. According to some reports, trench warfare led to the loss of "thousands of young lives in human-wave assaults on Eritrea's positions". On 16 March, following a two-week lull, Ethiopian forces launched an offensive on the Tsorona front, on the border south of Eritrea's capital, Asmara. A month after
Operation Sunset, the Ethiopian military launched an even larger assault on the fortified border town of Tsorona. Ethiopian troops were massed and sent forward in successive waves. Tens of thousands of poorly trained recruits were funneled into a 3-mile wide front. On 12 May, Ethiopia launched a massive combined arms offensive on multiple fronts involving four armored divisions and 22 infantry divisions, extensive artillery and close air support. The Ethiopians used pack animals such as
donkeys for logistical support for their infantry, and, due to their cumbersome logistical chain, primarily relied on infantry assaults to capture Eritrean positions. They held their tanks in reserve, then brought them forward to secure positions captured by the infantry. Ethiopian forces initially struggled to exploit the gaps they had torn in the Eritrean positions, often at great cost in frontal assaults against Eritrean trenches. Ethiopian sources stated that on 16 May, Ethiopian aircraft attacked targets between
Areza and Maidema, and between Barentu and
Omhajer, and that all aircraft returned to base, while heavy ground fighting continued in the Da'se and
Barentu area and in Maidema. The next day, Ethiopian ground forces with air support captured Da'se. Barentu was taken in a surprise Ethiopian pincer movement on the Western front. The Ethiopians attacked a mined but lightly defended mountain, resulting in the capture of Barentu and an Eritrean retreat. Fighting also continued in Maidema. Also on 17 May, due to the continuing hostilities, the United Nations Security Council adopted
Resolution 1298 imposing an
arms embargo on both countries. By 23 May, Ethiopia claimed that its "troops had seized vital command posts in the heavily defended
Zalambessa area, about south of the Eritrean capital, Asmara". and claimed it was a 'tactical retreat' to take away one of Ethiopia's last remaining excuses for continuing the war; a report from Chatham House observes, "the scale of Eritrean defeat was apparent when Eritrea unexpectedly accepted the OAU peace framework." Having recaptured most of the contested territories – and having learned that the Eritrean government would withdraw from any other territories it occupied at the start of the conflict, in accordance with a request from the OAU – Ethiopia declared the war was over on 25 May 2000.
Cessation of hostilities On 18 June 2000, the parties agreed to a comprehensive peace agreement and binding arbitration of their disputes under the
Algiers Agreement. On 31 July 2000, the United Nations Security Council adopted
Resolution 1312 and a 25-kilometer-wide Temporary Security Zone (TSZ) was established within Eritrea, patrolled by the
United Nations Mission in Ethiopia and Eritrea (UNMEE) , which was composed of personnel from over 60 countries. On 12 December 2000 a peace agreement was signed by the two governments. == Impact ==