Snapshot

For over a decade, instability across the Sahel and Lake chad has been closely linked to the collapse of Libya in 2011 and the subsequent proliferation of weapons and fighters across porous borders. That episode fundamentally reshaped the region’s security architecture, enabling insurgent and armed groups to scale operations across the Lake Chad Basin and the wider Sahel. Today, a comparable, though not identical, dynamic is emerging, this time centred on Sudan.

Since the outbreak of war in 2023 between the Rapid Support Forces (RSF) and the Sudanese Armed Forces (SAF), Sudan has undergone a gradual fragmentation of state authority. What began as a power struggle has evolved into a territorial conflict, with both sides consolidating control over distinct regions while relying on sustained external support. Although Sudan has not yet collapsed in the same manner as Libya, the erosion of governance structures and the militarization of economic networks are generating similar destabilisation pathways, albeit through more diffuse and contested mechanisms.

Sudan’s geographic position amplifies these risks. Sitting at the intersection of the Sahel, the Horn of Africa, and North Africa, instability within Sudan is uniquely positioned to radiate across multiple theatres. Critically, the spillover is no longer a prospective risk—it is already underway.

Along the Chad–Sudan border, particularly within the Tiné corridor and parts of Darfur, cross-border insecurity has intensified. Argon Open-source monitoring indicates multiple incidents since late 2025, including reported cross-border clashes and the use of drone strikes impacting Chadian territory. In one widely cited incident, a strike reportedly resulted in significant casualties, including Chadian security personnel. While attribution remains contested, these developments point to an expanding operational reach of the conflict and a growing erosion of territorial containment. The Chadian government’s decision to close sections of its border and deploy additional forces underscores a shift from indirect exposure to direct security threat.

This shift carries broader regional implications. Chad, long viewed as a relatively stable security anchor in the central Sahel, is now under simultaneous pressure from refugee inflows, cross-border incursions, and internal political fragility. The Sudan–Chad border, stretching over 1,400 kilometres of largely ungoverned terrain, is inherently difficult to secure. What is emerging is not merely a localised border crisis, but the gradual formation of a transnational conflict zone linking western Sudan (particularly Darfur) with eastern Chad and, by extension, wider Sahelian networks.

At the centre of this dynamic is the Tiné corridor, which is increasingly functioning as a logistical and economic artery within Sudan’s evolving war economy. Trafficking networks linking Sudan, Chad, and southern Libya are facilitating the movement of weapons, fuel, gold, and fighters across militia-controlled routes. These systems are not incidental—they are structural to how contemporary conflicts in the region are sustained. Control over such corridors enables armed actors to maintain supply chains, generate revenue, and extend influence across borders, effectively dissolving the distinction between domestic and regional insecurity.

A critical dimension of the Sudan conflict is the nature of warfare itself. Unlike earlier insurgencies in the Sahel, the conflict in Sudan has seen the growing use of advanced systems, including armed drones and precision-guided munitions. External actors—including United Arab Emirates, Iran, Russia, and Egypt—have provided varying forms of military support to the warring parties, enhancing both lethality and operational reach. Argon Open-source monitoring suggests that drones, in particular, are becoming central to battlefield tactics, enabling long-range strikes and altering the tempo of engagements.

The implications for the Sahel are significant. Sudan is not only a battlefield but is increasingly becoming a marketplace and transmission point for military capabilities. The diffusion of drone technology and associated tactical knowledge is unlikely to occur through a single pathway; rather, it may emerge through a combination of battlefield capture, proxy transfers, commercial adaptation, and the circulation of trained operators. Armed groups in Mali and elsewhere in the Sahel have already demonstrated a growing capacity to deploy drone-assisted attacks, indicating that the barrier to adoption is lowering. Over time, this could produce a major shift in the capabilities of both jihadist and non-ideological armed groups across the region.

Simultaneously, Sudan’s instability is creating strategic openings for a range of actors. Jihadist groups may exploit the diversion of state attention and resources to expand operational space, while non-ideological armed groups and trafficking networks are likely to capitalise on the expansion of cross-border economies. In eastern Chad and adjacent regions, longstanding ethnic and militia linkages—particularly those connected to Darfur—further increase the risk of conflict entanglement. The convergence of these dynamics raises the prospect of more fluid and interconnected armed networks spanning Sudan and the Sahel.

In parallel, the risk of a broader regional refugee crisis is intensifying. Eastern Chad is already absorbing a large influx of displaced populations fleeing the conflict in Sudan, particularly around key border settlements such as Adré. Current displacement patterns indicate that flows are likely to increase in the near term, placing sustained pressure on host communities and already fragile public infrastructure. This situation is further exacerbated by declining humanitarian funding and reduced aid delivery, which are constraining response capacity and widening critical gaps in food, shelter, and basic services.

As conditions in Chad deteriorate, there is a growing likelihood of secondary displacement across the region. Neighbouring countries, including Nigeria and Niger, may begin to experience increased cross-border movements as displaced populations seek more viable coping options. Simultaneously, alternative migration routes are emerging beyond the immediate region, with Sudanese refugees increasingly moving toward Gulf destinations such as the United Arab Emirates and Saudi Arabia in search of economic opportunities and relative stability.

Despite these trends and potential risk, the response from neighbouring states—including Chad, Nigeria, and Niger—has remained limited and largely reactive. This reflects both domestic constraints and the weakening of regional coordination mechanisms. However, it also highlights a deeper strategic gap.

While external actors involved in the Sudan conflict possess the capacity to sustain the war, they do not bear the primary costs of its spillover. Instead, the socioeconomic and security burdens fall disproportionately on neighbouring states. This imbalance underscores the need for a shift from reactive monitoring to proactive regional engagement. Platforms such as the African Union and the Lake Chad Basin Commission provide potential avenues for coordinated diplomatic pressure, joint border management frameworks, and more structured engagement with the warring parties.

There is, however, a narrowing window for such action. Shifting geopolitical priorities—particularly the growing focus of major powers on crises in the Middle East—may reduce the intensity or consistency of external engagement in Sudan. While this could prolong instability, it may also create space for regional actors to assert greater diplomatic leadership. A coordinated bloc of states most exposed to the spillover—particularly Chad, Nigeria, and Niger—could, if aligned, exert meaningful pressure through both regional and multilateral channels.

Ultimately, the resolution of the Sudan conflict cannot be outsourced. The actors with the greatest leverage are those most directly exposed to its consequences. If regional states fail to act collectively and decisively, the Sudan war risks becoming a systemic driver of instability across the Sahel—replicating key elements of Libya’s destabilising legacy while introducing new and more complex threat vectors.

The “Sudan effect” is no longer an emerging risk. It is an unfolding reality—one that is already reshaping the security landscape of the Sahel and redefining the contours of regional instability.