Death at the Border: A Crisis Long Forecast

{
  "title": "Sudan's War is Spilling Over its Borders",
  "slug": "sudans-war-spilling-over-borders-chad",
  "category": "Geopolitics",
  "article": "Of all the active armed conflicts reshaping the geopolitical landscape in 2026, Sudan's civil war remains among the most underreported — and potentially the most destabilizing. The conflict, which ignited in April 2023 between the Sudanese Armed Forces (SAF) and the paramilitary Rapid Support Forces (RSF), has already generated a death toll estimated in the hundreds of thousands and displaced millions. Now, growing evidence suggests the war is crossing borders in ways that could destabilize the entire region.

The most immediate flashpoint is Chad. Since late December 2025, a series of armed incursions by the RSF into Chadian territory has escalated to the point where N'Djamena sealed its 1,400-kilometre border with Sudan. The border closure followed a February 21 attack in which RSF troops crossed into the Chadian border town of Tine, pursuing elements of a pro-Sudanese government Joint Force that had retreated across the frontier. When Chadian soldiers attempted to intervene, five were killed. It was the most direct confrontation yet between Chad's national military and the RSF — and it landed against a backdrop of simmering internal tensions that Sudan analysts say could push Chad's fragile regime toward collapse.

## Death at the Border: A Crisis Long Forecast

The threat of Sudan's war spilling into neighboring states is not new. In September 2025, the International Crisis Group sounded a formal alert: "The conflict that has been ravaging Sudan for more than two years is posing a growing threat to the stability of its neighbour, Chad." At the time, the RSF had not yet completed its near-total takeover of Darfur, the vast arid region in western Sudan that shares a border with eastern Chad. Nor had the paramilitaries yet overrun El-Fasher, the last major city in Darfur not under RSF control — a conquest so violent that estimates of the death toll range as high as 100,000, with 60,000 dead in two weeks considered a credible midpoint figure.

The border incidents began before El-Fasher's fall. In late December 2025, an RSF drone crossed into Chad and bombed the border post of Al-Tina, killing two Chadian soldiers. Two weeks later, RSF fighters crossed the frontier directly, clashing with Chadian forces in a skirmish that left seven dead. The February 21 Tine incursion — which killed five more Chadian soldiers — was the third and most serious escalation in fewer than three months.

The humanitarian dimension compounds the military pressure. According to BBC reporting, more than one million Sudanese have sought refuge on Chadian territory since the war began. The border town of Adré, which had a pre-war population of roughly 20,000, has swollen to over 250,000 residents. Crisis Group documented how this influx has "caused living conditions in eastern Chad to deteriorate, fuelling crime and inter-ethnic distrust." The Chadian government, headquartered hundreds of kilometres to the west, has struggled to manage the scale of the displacement.

Ethnic Fault Lines and the Geometry of Violence

To understand why these border incidents carry such outsized strategic risk, it is essential to understand the ethnic architecture of the conflict. Sudan’s war in Darfur has taken on an increasingly genocidal character. The RSF is led by Mohamed Hamdan Dagalo — known as Hemedti — a warlord from the Rizeigat tribe. His forces are predominantly composed of nomadic Arab herders. Their primary victims are drawn from the settled Black African communities of Darfur: the Masalit, the Zaghawa, and others.

The critical complication is that these ethnic and tribal communities do not stop at the Sudanese border. The Zaghawa, for instance, are a trans-border people found in both eastern Chad and Darfur. The same applies to several Arab tribal groups, including the Rizeigat. This means the war’s ethnic logic has imported itself directly into Chadian society, arriving with every wave of refugees who have crossed the border having survived massacres at the hands of Arab militias — only to find themselves living in proximity to members of those same communities on the Chadian side.

The consequences within Chad’s military have been significant. The Zaghawa constitute a large portion of the Chadian officer corps, including many senior positions. As the RSF conducted mass killings of Zaghawa in Darfur, Chadian officers did not process these events as a foreign atrocity. They experienced them as the slaughter of their kin.

One officer told Le Monde that Arab tribes in Chad were celebrating a genocide of his people. “Crisis meetings are taking place among us (officers),” he said, “and the conflict is increasingly being seen as a war between Zaghawa and Arabs.”

Before the RSF overran El-Fasher, one of the city’s principal defensive forces was commanded by Darfur governor Minni Minnawi, himself a Zaghawa. A number of Chadian soldiers crossed the border to assist in the city’s defense — acting on ethnic solidarity, not Chadian state policy. When El-Fasher fell and the RSF killings accelerated, the mood within the Chadian military is reported to have shifted closer to mutiny. A former adviser to President Déby told The Africa Report: “Chadian Zaghawas have family ties in Sudanese Darfur.

They find it hard to accept that the RSF pursues their brothers onto Chadian soil.”

N’Djamena’s Contradictory Position

What makes Chad’s predicament uniquely precarious is the extraordinary contradiction at the heart of its foreign policy. Despite presenting itself publicly as a neutral party in Sudan’s war, N’Djamena has been covertly backing the RSF — the same force now killing its soldiers and destabilizing its border regions.

The explanation requires a detour through Middle Eastern geopolitics. Chad’s current president, Mahamat Déby, came to power following the 2021 death of his father, Idriss Déby, who was killed while suppressing a rebel advance on the capital. Qatar backed the younger Déby’s assumption of power on an interim basis. A rupture followed when Doha pressed Déby to honor the transitional arrangement and step aside before 2024 elections.

Déby declined, effectively treating “interim” as permanent. The fallout with Qatar sent him searching for new patronage.

He found it in the United Arab Emirates. Abu Dhabi, for its own strategic reasons — including access to smuggled Sudanese gold and a desire to prevent the return of an Islamist government in Khartoum — has been the RSF’s primary external sponsor. The price of Emirati backing for Déby was that Chad would facilitate the flow of weapons and money to the paramilitaries.

The mechanism became visible in 2023 when the UAE funded construction of a new airport at Amdjarass, a border town in Chad’s east where Déby’s political support is concentrated. The Emirates insisted it was a field hospital for treating Sudanese refugees. Multiple independent investigations — by journalists, the United Nations, and open-source intelligence analysts — concluded otherwise: the airport served primarily as a logistics hub for Emirati arms shipments to the RSF. In exchange, Déby received an estimated two billion dollars in loans — an enormous sum in a country with a GDP per capita of roughly $3,000.

The irony is that Déby, who is himself part Zaghawa through his father’s lineage, has apparently become convinced that the Zaghawa within Chad represent the greatest internal threat to his regime. According to Le Monde reporting, he has calculated that if an armed challenge to his rule materializes, the RSF might directly intervene to preserve him in power. Sudan expert Cameron Hudson captured the resulting instability in stark terms: “Missing in all the reporting of Chad closing its border with Sudan is any discussion of the domestic political/security environment inside Chad and the Deby inner circle that necessitated the move. This is a regime on the verge of war from within.”

The Supply Route Problem and the RSF’s Strategic Gamble

One of the more significant — and underreported — geopolitical shifts of recent months has been the fracturing of the Saudi-UAE alignment that previously shaped much of the MENA region’s political order. The two Gulf states, once closely coordinated on Yemen, the Qatar blockade, and broader regional strategy, have diverged sharply over Sudan. Riyadh, fearing that sustained chaos could spread to Sudan’s Red Sea coast — directly opposite Jeddah — has concluded that the Sudanese Armed Forces offer a more viable path to restoring order. The RSF, in Riyadh’s assessment, exports instability.

This analysis has translated into a concerted Saudi effort, in coordination with Egypt and Turkey, to cut the RSF’s supply lines. Where diplomacy has been insufficient, force has been applied. Eastern Libya under General Khalifa Haftar had previously served as the RSF’s primary resupply node, with Emirati weapons landing at al-Kufra Airport and being transported overland through North Darfur. Turkish drones flying from Egyptian bases began targeting those convoys.

Cairo, itself a former beneficiary of Emirati largesse, leaned on Haftar to halt the shipments. By January 2026, Amdjarass in Chad had become the RSF’s primary logistics conduit.

This context makes the RSF’s decision to conduct cross-border raids into Chad deeply puzzling. The Critical Threats project has noted that no alternative resupply route is as well-positioned as Amdjarass: “The UAE is continuing efforts to open a new supply route via Ethiopia, but this route would not link directly to the RSF’s main rear support zones in western Sudan.” With its main supply corridor running through Chadian territory — and with that corridor dependent on N’Djamena’s acquiescence — the RSF appears to be attacking the very state it needs to remain passive.

A diplomatic source quoted by The Africa Report offered one reading of how this dynamic resolves: “Once the conflict spills further onto his own territory, pragmatism prevails and (Déby) must prioritise the defence of Chadian Zaghawas and the preservation of territorial integrity. Any support — limited as it was — for the RSF stops at the Chadian border.”

The RSF’s attack on the stronghold of Musa Hilal in Misteriha added yet another layer of complexity. Hilal, a longtime rival of Hemedti and a powerful figure from the Rizeigat Mahamid tribe, had maintained his own independent territory in Darfur. The RSF assault overran his position and killed members of his family. The Sudan War Monitor noted the cross-border implications immediately: the Rizeigat Mahamid tribe inhabits both sides of the Chad-Sudan border, meaning the attack further raises the likelihood of spillover beyond the Zaghawa dynamic already in play.

The Regional Stakes and the Question of Collapse

The situation in Chad does not exist in isolation. South Sudan and Ethiopia have both faced border insecurity, refugee flows, and the destabilizing movement of armed groups. Rebel factions within Chad — including splinters of the Front for Change and Concord that nearly marched on N’Djamena in 2021 — have sent fighters across the border to join the RSF, gaining weapons and battlefield experience in the process. The Global Initiative NGO assessed this cooperation as transactional rather than ideological, but the outcome is the same: armed groups within Chad have been strengthened by their association with a foreign paramilitary in the middle of a genocide.

What is at stake, then, is not simply the stability of a single border. It is the question of whether Sudan’s war — already one of the deadliest conflicts on the planet — becomes the catalyst for a cascading regional collapse. Chad has a GDP per capita of roughly $3,000. Its military officer corps is divided along ethnic lines that map directly onto the Sudan conflict.

Its president has backed a paramilitary that is now killing Chadian soldiers and threatening the country’s territorial integrity. And its eastern border regions have been transformed by a refugee crisis of extraordinary scale.

The trajectory is not inevitable. Sudan’s neighbors have been absorbing pressure from this conflict for nearly three years, and most have held together — however precariously. But the pattern of escalation since December 2025 represents a qualitative shift. The RSF is no longer merely threatening Chad’s stability through proxy dynamics and refugee pressure. It is killing Chadian soldiers on Chadian territory.

Whether Déby’s regime can survive the convergence of Emirati financial dependency, Zaghawa military discontent, direct RSF incursions, and a refugee crisis of historic proportions remains the central question in the region’s near-term trajectory. The answer, when it comes, is unlikely to be gradual. Regime stability in the Sahel rarely breaks incrementally. It tends to hold, then shatter — and the pieces are rarely reassembled cleanly.

”, “metaTitle”: “Sudan’s War Is Spilling Over Into Chad”, “metaDescription”: “RSF cross-border raids into Chad have killed Chadian soldiers and closed the border, threatening to ignite a wider regional war fueled by ethnic tensions and geopolitical rivalry.” }