The formation of the Alliance of Sahel States in early 2025 signified a pivotal break in the security set up in West Africa. Burkina Faso, Mali and Niger officially left ECOWAS and disbanded their membership of the G5 Sahel Joint Force and substituted ten years of experimentation in multilateral counterterrorism with a sovereignty-first policy. The change did not happen out of the blue but was a sum of frustrations caused by the perceived external pressure and ineffectiveness in the joint military systems.
By mid 2025, the institutional breakdown had been reflected in a security vacuum over large borderlands. In the absence of joint patrols or intelligence systems, former controlled zones along the frontiers turned into open paths of movement of armed forces. Analysts monitoring field data reported that jihadist groups quickly adapted to this new disaggregated environment to re-calibrate logistics, recruitment and attack planning to take advantage of weakened state coordination.
G5 collapse consequences and expanding jihadist operational space
The dissolution of the G5 Sahel framework removed a critical layer of cross-border coordination spanning nearly 2,000 kilometers of contested terrain. Within months, violence indicators surged sharply, with cross-border incidents attributed to JNIM increasing by 86 percent in 2025 compared to the previous year. Civilian casualties followed a parallel trajectory, exceeding 1,000 deaths in affected zones across Burkina Faso, Niger, and adjacent coastal states.
This deterioration was not limited to battlefield outcomes but extended into governance vacuums. In northern Burkina Faso, for example, JNIM-linked networks intermittently disrupted state presence in towns like Djibo, demonstrating an ability to exert influence without formal territorial annexation. The pattern suggested an evolving operational logic where control is exercised through mobility, taxation, and selective coercion rather than permanent occupation.
The withdrawal of UN missions such as MINUSMA further compounded the vacuum. Their exit reduced not only peacekeeping presence but also logistical intelligence sharing networks that had previously functioned as early-warning systems. In their absence, national militaries struggled to anticipate coordinated multi-front attacks.
Intelligence fragmentation and rise of bilateral security substitutes
The intelligence sharing was becoming more fragmented, as multilateral systems were getting weaker. The operations of coordination mechanisms had supported quick transmission of operational information between Sahel states and external partners prior to 2025, but post-fracture dynamics posed delays and jurisdiction. This enabled armed groups to be cross-border with minimal risks of detection.
In reaction, bilateral arrangements have started to come up as viable alternatives. This trend towards the local security architecture can be traced in the Benin-Nigeria border pact announced in early 2026. The lack of more regional structures was offset by joint patrols and coordinated surveillance systems. Consultations with French technical assistance provided an additional surveillance and reconnaissance aspect, but the operational control was still located domestically.
Such arrangements have been termed by analysts like Enagnon Wilfried Adjovi to be hybrid prevention-response mechanisms, which involve intelligence fusion and quick field deployment. The model highlights a more general trend whereby states are more concerned with functional cooperation as opposed to institutional completeness.
Coastal spillover and transformation of conflict geography
A southwards shift of the violence to coastal West Africa has been one of the greatest changes that have ensued after the Sahel fractures. Togo, Benin and Nigeria have been increasingly affected by spill over of the insurgent theaters in the North turning hitherto peripheral border zones to front lines of security. In 2025 alone, Benin had witnessed several high-casualty attacks such as an attack that killed dozens of soldiers in the northern departments.
Another area that is experiencing increased exposure to cross-border incursions in Nigeria is the northwestern parts of the country including Sokoto, Kebbi and Niger. These regions have become logistic links between Sahel rebel groups and coastal cities. The development of organized violence zones between rural strongholds and semi-urban supply lines can be seen in ACLED data as a sign of a more developed operational geography, compared to the previous stages of insurgency.
This change has compelled countries on the coast to reevaluate national defense policies. Governments have started to portray Sahel instability as a problem of immediate territorial security that requires direct military intervention as opposed to the perception that it is a far-off problem.
AES security doctrine and limits of sovereignty-first counterterrorism
The Alliance of Sahel States has undertaken a much different approach to counterterrorism doctrine, promoting national sovereignty and bilateral military restructuring, as opposed to multilateral cooperation. By the end of 2025, French and UN troops were forced to leave several theaters and Russian advisory groups were deployed to cover the absence of operations. Nevertheless, ground-level evaluations indicate a low success rate in overcoming the changing insurgent strategies, especially drone-based attacks and joint multi-front attacks.
The geographical scope of operations of JNIM increased dramatically in the process, with it being estimated that up to 40 percent of the whole of northern Mali and neighboring areas were at risk. The group did not go into their shell under the pressure of the military but instead adjusted by fitting into the local governance systems, taxing, and having parallel systems of administration. This strategy made it less susceptible to the traditional military attacks and made it more resourceful.
Inconsistencies among states of AES complicated co-ordinated actions. The rivalry among prioritization of the borders and allocation of resources undermined the joint strategy implementation, resulting in disproportional security coverage of neighboring lands.
Evolution of counterterrorism architecture under fragmented multilateralism
The larger regional drift is indicative of what analysts are starting to term as a Multilateral Mirage in which traditional security structures are still holding on to their rhetoric but disintegrating in reality. The disintegration of the G5 Sahel highlighted structural constraints of externally supported regional coalitions, which did not have long-term political unity among member countries.
Instead, a hybrid architecture is being developed. The current operating environment of bilateral agreements, regionalized military alliances, and selective foreign technical support characterizes the operational environment. Efforts like Africa Endeavor 2025 where interoperability and sharing of digital intelligence were prioritized are an indication of trying to restructure coordination by using modular systems as opposed to centralized systems.
Given terrorism evaluations in the world in 2025, the stakes of this transition are further highlighted. More than half of the world terrorism-related deaths were credited to the Sahel, giving it credence as the center of modern day insurgence. Analysts however observe that although there is a decrease in the frequency of the attacks in certain regions, lethality and organizational sophistication has steadily risen, which points to deeper structural entrenchment, as opposed to weakening.
Adaptive insurgency and future trajectory of regional security
The adaptive strategies employed by groups such as JNIM and IS Sahel suggest that counterterrorism responses must evolve beyond kinetic engagement. Their shift toward taxation, governance replication, and mobility-based warfare complicates traditional military doctrines. These networks increasingly function as hybrid entities combining insurgency, criminal enterprise, and proto-administrative authority.
Climate stress, population displacement, and economic precarity continue to feed recruitment pipelines, reinforcing long-term sustainability for these groups. Without integrated development and security frameworks, military gains risk remaining temporary disruptions rather than structural reversals.
As fragmented alliances attempt to reconstruct operational coherence through bilateral and technical partnerships, the region faces a critical question of strategic design. Whether these emerging configurations can collectively substitute for collapsed multilateral systems remains uncertain, particularly as insurgent networks continue to adapt faster than institutional responses.
