The Eritrean–Ethiopian border conflict was a violent standoff and a proxy conflict between Eritrea and Ethiopia lasting from 1998 to 2018. It consisted of a series of incidents along the then-disputed border; including the Eritrean–Ethiopian War of 1998–2000 and the subsequent Second Afar insurgency.
It included multiple clashes with numerous casualties, including the Battle of Tsorona in 2016. Ethiopia stated in 2018 that it would cede Badme to Eritrea. This led to the Eritrea–Ethiopia summit on 9July 2018, where an agreement was signed which demarcated the border and agreed a resumption of diplomatic relations.
Background Colonisation and border conflict In March 1870, an Italian shipping company became a claimant to the territory at the northern end of Assab Bay, a deserted but spacious bay about half-way between Annesley Bay to the north and Obock to the south. The area —which had long been dominated by the Ottoman Empire and Egypt was not settled by the Italians until 1880. In 1884, the Hewett Treaty was signed between the British Empire and Ethiopia, ruled by Emperor Yohannes IV (r. 1871–1889). The British Empire promised the highlands of modern Eritrea—and free access to the Massawan coast to Ethiopia in exchange for its help evacuating garrisons from the Sudan, in the then-ongoing Mahdist War. In 1889, amid the disorder that followed the death of Yohannes IV, Italian General Oreste Baratieri occupied the highlands along the Eritrean coast and Italy proclaimed the establishment of a new colony of "Eritrea", (from the Latin name for the Red Sea), with its capital at Asmara in substitution for Massawa. On 2May 1889, the peace and friendship Treaty of Wuchale was signed between Italy and Ethiopia, under which Italian Eritrea was officially recognised by Ethiopia as part of Italy.
However, Article 17 of the treaty was disputed, as the Italian version stated that Ethiopia was obliged to conduct all foreign affairs through Italian authorities (in effect making Ethiopia an Italian protectorate), while the Amharic version gave Ethiopia considerable autonomy, with the "option" of communicating with third powers through the Italians. This resulted in the First Italo-Ethiopian War, which the Ethiopians won, resulting in the Treaty of Addis Ababa in October 1896. Italy paid reparations of ten million Italian lira. Unusually, the Italians retained most, if not all, of the territories beyond the Mareb-Belessa and May/Muni rivers that they had taken, with Emperor Menelik II () giving away part of Tigray. On 2August 1928, Ethiopia and Italy signed a new friendship treaty.
Ethiopia under Italian rule
On 22November 1934, Italy claimed that three senior Ethiopian military-political commanders with a force of 1,000 Ethiopian militia arrived near Walwal and formally requested the garrison stationed there, comprising about 60 Somali soldiers, known as dubats, to withdraw. The Somali NCO leading the garrison refused and alerted Captain Cimmaruta, commander of the garrison of Uarder, away, what had happened. Between 5 and 7December 1934, for reasons which have never been clearly determined, a skirmish broke out between the garrison and the Ethiopian militia. According to the Italians, the Ethiopians attacked the Somalis with rifle and machine-gun fire. According to the Ethiopians, the Italians attacked them, supported by two tanks and three aircraft. According to historian Anthony Mockler 107 Ethiopians were killed. By 3October 1935, the Italian Army led by General Emilio De Bono launched an invasion of Ethiopia, without a declaration of war. This was the start of a new war called the Second Italo-Ethiopian War. In May 1936, the Italian Army occupied the Ethiopian capital Addis Ababa. The occupied country was annexed into the Italian East African colony together with the other Italian east African colonies.
On 10June 1940, Italy declared war on Britain and France; in March 1941, Britain began a campaign to capture the Italian-held territory in the region. By November, the British had occupied the whole Italian East African colony. However thousands of Italian soldiers began conducting a guerrilla war within their former colony which lasted until October 1943. After the end of WWII, Ethiopia regained her independence, and Eritrea was placed under Britain military administration.
Prelude Eritrea as part of Ethiopia
After the war there was a debate as to what would happen to Eritrea. After the Italian communists' victory in the 1946 Italian general election they supported returning Eritrea to Italy under a trusteeship or as a colony. The Soviet Union similarly wished to make it their trustee; and tried, unsuccessfully, to achieve this by diplomatic means.
Ethiopian Emperor Haile Selassie I () also claimed Eritrea. In 1952 the United Nations decided that Eritrea would become part of the Ethiopian Empire. Eritrea became a special autonomous region within a federated Ethiopia.
In 1958, a group of Eritreans founded the Eritrean Liberation Front (ELF). The organisation mainly consisted of Eritrean students, professionals and intellectuals. It engaged in clandestine political activities intended to cultivate resistance to the centralising policies of the imperial Ethiopian state. During the following decade the Emperor decided to dissolve the federation between Ethiopia and Eritrea, annexing the special region and bringing it under direct rule.
This resulted in an almost thirty-year long armed struggle known as the Eritrean War of Independence. The ELF engaged in armed conflict against the Ethiopian Government from 1September 1961. In 1970 a group called the Eritrean People's Liberation Front (EPLF) broke off from the ELF. They were fierce rivals and in February 1972, the First Eritrean Civil War broke out between them. Their rivalry paused in 1974, and calls for the conflict to stop were finally heeded. These calls for peace came from local villagers at a time when the independence movement was close to victory over Ethiopia. On 12September 1974, a successful coup d'état was carried out against the Emperor led by Lieutenant General Aman Andom. The government was led by members of the pro-Soviet Ethiopian military, which established an almost seven-year long military junta.
The ELF-EPLF's peace lasted only six years; in February 1980 the EPLF declared war on the ELF, after which the ELF and the Soviet Union started secret negotiations. The Second Eritrean Civil War lasted until 1981, and the EPLF emerged victorious. The ELF was driven out of Eritrea into Sudan. On 27May 1991 the new Ethiopian Transitional Government was formed after the fall of the pro-Soviet government. The Ethiopian Transitional Government promised to hold a referendum, within two years in the region. The referendum was held between 23 and 25April 1993 with 99.81% voting in favour of independence. On 4May 1993 the official independence of Eritrea was established. However, the border between Ethiopia and newly independent Eritrea was not clearly defined. After border skirmishes in late 1997, the two countries attempted to negotiate their boundary. In October 1997, Ethiopia presented the Eritrean Government a map showing Eritrean-claimed areas as part of Ethiopia.
History
Major combat phase (1998–2000)
On 6May 1998, border clashes erupted between Ethiopia and Eritrea, killing several Eritrean civilians in the Eritrea town of Badme. Ethiopian soldiers attacked Eritrean civilians and Eritreans soldiers retaliated. According to a 2005 ruling by the Permanent Court of Arbitration, Eritrea triggered the war by invading Ethiopia.
On 13May 1998, Eritrean radio described the incidents as a "total war" policy from Ethiopia, and claimed that the Ethiopian Army was mobilising for a full assault against Eritrea. The Claims Commission (established by the Algiers peace agreement) found that this was, in essence, an affirmation of the existence of a state of war between belligerents, not a declaration of war, and that Ethiopia also notified the United Nations Security Council, as required under Article 51 of the UN Charter. On 1March 1999 Ethiopia declares victory over Eritrea by recapturing the Badme region on the Eritrea side it denies its defeat. By the time Ethiopian forces had broken through Eritrea's fortified front and was deep into Eritrean territory, Eritrea accepted the Organisation of African Unity (OAU) peace plan on 27February 1999. The "proximity talks" broke down in early May 2000 "with Ethiopia accusing Eritrea of imposing unacceptable conditions". On12 May the Ethiopians launched an offensive that broke through the Eritrean lines between Shambuko and Mendefera, crossed the Mareb River, and cut the road between Barentu and Mendefera, the main supply line for Eritrean troops on the western front of the fighting. Ethiopia declared the war was over at 25May 2000. At the end of May 2000, Ethiopia occupied about a quarter of Eritrea's territory.
Post-war conflict on the border (2000–2018)
After a cease-fire was established on 18June 2000, both parties agreed to have a demilitarised zone called the Temporary Security Zone (TSZ). It was patrolled by the United Nations Mission in Ethiopia and Eritrea (UNMEE) an organisation for the border stabilisation and the prevention of future conflicts between the countries. On 31July 2000, the UNMEE was officially launched and started patrolling the border. On 12December 2000, a peace agreement was signed in Algiers. In August 2002 Eritrea released all the Ethiopian POWs.
Both countries vowed to accept the decision wholeheartedly the day after the ruling was made official. A few months later Ethiopia requested clarifications, then stated it was deeply dissatisfied with the ruling. In September 2003 Eritrea refused to agree to a new commission, which they would have had to agree to if the old binding agreement was to be set aside, and asked the international community to put pressure on Ethiopia to accept the ruling. In November 2004, Ethiopia accepted the ruling "in principle".
2005–2006 On 10 December 2005, Ethiopia announced it was withdrawing some of its forces from the Eritrean border "in the interests of peace". Then, on 15 December the United Nations began to withdraw peacekeepers from Eritrea in response to a UN resolution passed the previous day.
On 21 December 2005, a commission at the Permanent Court of Arbitration in The Hague ruled that Eritrea broke international law when it attacked Ethiopia in 1998, triggering the broader conflict."Ruling: Eritrea broke international law in Ethiopia attack " CNN 21 December 2005
Ethiopia and Eritrea subsequently remobilized troops along the border, leading to fears that the two countries could return to war. On 7 December 2005, Eritrea banned UN helicopter flights and ordered Western members (particularly from the United States and Europe) of the UN peacekeeping mission on its border with Ethiopia to leave within 10 days, sparking concerns of further conflict with its neighbour.Eritrea orders Westerners in UN mission out in 10 days, International Herald Tribune, 7 December 2005 In November 2006 Ethiopia and Eritrea boycotted an Eritrea–Ethiopia Boundary Commission meeting at The Hague which would have demarcated their disputed border using UN maps. Ethiopia was not there because it does not accept the decision and as it will not allow physical demarcation it will not accept map demarcation, and Eritrea was not there because although it backs the commission's proposals, it insists that the border should be physically marked out.
2007–2011