Tigray War Escalates: Conflict Spills Over to Sudanese Border

The border region between northwestern Ethiopia and Sudan, specifically near the Tekeze-Setit River, has become one of the most volatile points in the Horn of Africa. This area, stretching between Shiraro, Humera, and Tekeze, is currently experiencing the intersection of three distinct but interconnected conflicts: the Tigrayan war, the Sudanese war, and a simmering Ethiopian-Eritrean dispute. The escalating tensions have led to cross-border incidents, threatening to expand into a wider regional crisis.

On August 1, clashes erupted in the Shererina area of western Tigray, close to the Sudanese border, between forces of the Tigray People's Liberation Front (TPLF) and Ethiopian federal forces. The fighting involved heavy artillery and drones, with shelling extending into Sudanese territory and impacting refugee camps, resulting in an unspecified number of casualties, as reported by the Sudanese Interior Ministry and Commission for Refugees. Following a day of intense conflict, civilians and wounded TPLF fighters sought refuge and treatment in eastern Sudan. Further escalation occurred on August 10, when an Ethiopian army drone struck a secondary school and a nearby riverbed in Merewa, killing three TPLF fighters and injuring seven others, according to the BBC.

These skirmishes are not isolated incidents but rather the culmination of months of mutual military buildups and deteriorating relations. Tensions between Addis Ababa and the Tigrayan leadership have been escalating, compounded by strained relations between Ethiopia and Eritrea. Moreover, the crisis in northern Ethiopia is increasingly intertwined with the ongoing Sudanese civil war, creating a complex web of alliances and accusations. Both the Sudanese national army and the Ethiopian government have traded accusations of supporting their respective opponents. Ethiopian authorities claim the Sudanese army aids elements of the TPLF, while TPLF fighters are alleged to be supporting Sudan's army in the current conflict.

Historically, the Sudanese border has served as a crucial strategic depth for Ethiopian opposition forces, and eastern Sudan has been a transit point for refugees, fighters, and weapons. In the current context, multiple sources have reported movements of Tigrayan forces, specifically Army 70, in eastern Sudan along the Ethiopian border. The Ethiopian government views the Tigrayan refugee camps in Sudan, which house those who fled the 2020-2022 war, as recruitment centers for TPLF fighters. A source from the Um Rakuba camp in Gedaref State claimed that TPLF officials have organized extensive mobilization efforts and broadcast calls to arms via loudspeakers within the camp.

Conversely, Sudanese authorities have accused the Addis Ababa government of arming and training the Rapid Support Forces (RSF) within its territory. The TPLF further claims that the RSF participated in the August fighting in western Tigray. Political analyst Chalachew Tadesse questioned the RSF's involvement, suggesting the TPLF might be attempting to regionalize the war for strategic advantage. In February, Reuters reported, citing sources and satellite imagery, a secret camp in Ethiopia's Benishangul-Gumuz region allegedly used to train an estimated 4,300 RSF fighters, with claims of UAE funding. Both Ethiopia and the UAE have categorically denied these allegations. Nevertheless, a recent RSF attack in Geisan, a town bordering Ethiopia, suggests their forces may have crossed into Sudan via the Ethiopian border.

According to security expert and former Sudanese army Major-General Jaafar Hassan Mohamed, this exchange of accusations poses a significant crisis for Sudan, potentially leading both sides to support rebel factions and escalate a regional conflict. Eritrea, which previously fought alongside Ethiopian and Amhara forces against the TPLF, is now perceived as having shifted its allegiance to support the TPLF, further raising the stakes. Tensions between Ethiopia and Eritrea also stem from Eritrea's exclusion from the 2022 peace talks and accusations of Eritrean forces occupying Ethiopian territory. Another critical factor is Ethiopia's long-standing desire for sea access, having been landlocked since Eritrea's independence in 1993. Eritrea views any forceful attempt by Ethiopia to gain sea access as a direct threat to its security and sovereignty, thus linking the Tigray crisis to the broader struggle for Red Sea control.

While political analysts like Chalachew Tadesse and Khalid Taha do not believe the recent Shererina clashes will necessarily trigger a longer, wider conflict, they acknowledge that regional influences could provide the spark. Both Sudan and Ethiopia are currently entangled in internal wars (Oromia and Amhara for Ethiopia; internal conflict for Sudan), which may limit their interest in escalating conflicts in Tigray. However, Khalid Taha, a specialist in Horn of Africa affairs, does not rule out the potential influence of external regional actors such as Egypt, Saudi Arabia, and the United Arab Emirates. He notes that regional alignments are fluid, with key powers pursuing distinct self-interested agendas: Egypt focuses on Nile water rights, Saudi Arabia on Red Sea security and Sudanese stability, while the UAE maintains deep strategic ties with Ethiopia and is accused of supporting the RSF. Taha emphasizes that the Gulf rivalry is a significant part of the regional environment, making the situation inherently more dangerous due to the intersections of interests, shifting rivalries, and independent calculations of each country.