The Sahel between Militarization and Fragmentation: The Escalation of Regional Rivalries Redefines the West African Security Architecture

West Africa is undergoing an unprecedented period of strategic reconfiguration, marked by accelerated militarization and political fragmentation that threaten to transform the Sahel into a theater of interstate confrontation. Developments since December 2025 reveal the emergence of two competing blocs with antagonistic visions of the fight against terrorism, in a context where jihadist groups continue their territorial expansion despite the accumulation of forces deployed against them.

The bold attack on the Diori Hamani International Airport in Niamey, which occurred on January 29, 2026, particularly illustrates the ineffectiveness of current military strategies. Thirty fighters from the Islamic State's Sahel Province assaulted the strategic infrastructure for two hours, which houses both Nigerien drone operations and the headquarters of the Sahel States Alliance. Despite the elimination or capture of all assailants, the operation achieved its political objective: to demonstrate that terrorist groups retain their operational capacity and can strike at the very heart of the regional security apparatus. This attack constitutes, according to analysts from African Security Analysis, "a notable operational escalation" aimed at testing the responsiveness of security forces and undermining state authority.

The proliferation of competing security architectures is the most concerning phenomenon of the current period. In December 2025, the Sahel States Alliance, comprising Mali, Burkina Faso, and Niger, inaugurated a joint force of 5,000 soldiers, presented as a symbol of strategic autonomy and security self-sufficiency. This initiative, modeled after NATO with its mutual defense article, marks a major institutional break with the Economic Community of West African States (ECOWAS), which military juntas now perceive as a threat to their sovereignty rather than as a regional partner.

In response to this fragmentation, ECOWAS announced in August 2025 an ambitious plan to activate a joint counter-terrorism force of 260,000 soldiers, supported by an annual budget of $2.5 billion for logistical and operational support. ECOWAS Commissioner for Political Affairs, Peace, and Security, Abdel-Fatau Musah, confirmed the deployment of a Rapid Deployment Force of 1,650 personnel in 2026, with an initial goal of 2,000 soldiers by the end of the year. These figures, while symbolically significant, raise fundamental questions about the actual capacity for coordination and funding of such a structure, in a context where relations between member states have significantly deteriorated.

The geopolitical dimension of this fragmentation has brutally manifested with the American deployment in Nigeria. The Nigerian Ministry of Defense confirmed in February 2026 the arrival of about 100 American military personnel, the first tranche of a total contingent of 200 soldiers intended to bolster local counter-terrorism capabilities. These forces join teams already present at the air bases in Benue, Kainji, and Maiduguri, where they provide technical support and intelligence for validating precision strike targets. This presence follows airstrikes conducted on December 25 by the Trump administration against Islamic State positions in northwestern Nigeria, an operation described by the American president as "a powerful and deadly strike against the terrorist scum of the Islamic State," with the promise of "many more" to come.

For the Sahel States Alliance, this strengthening of security cooperation between Washington and Abuja represents a direct strategic threat. Having severed their ties with the United States, France, and the European Union in favor of a partnership with Russia, the juntas in Bamako, Ouagadougou, and Niamey perceive this American presence as an attempt at Western reinvestment in their immediate environment. The potential deployment of the ECOWAS force, supported by the United States and operating in close proximity to the territories of the AES, creates a tangible risk of military confrontations between the two blocs, particularly given the porosity of borders and the fluidity of combat environments in the region.

This accelerated militarization is occurring paradoxically in a context where insecurity continues to worsen on the ground. In Burkina Faso, the Jama'at Nusrat al-Islam wal-Muslimin (JNIM) group, affiliated with Al-Qaeda, conducted over 500 attacks in 2025 according to the SITE Intelligence Group. Extremists now control up to 60% of the national territory, virtually encircling the capital Ouagadougou, while security forces and volunteer militias find themselves confined to areas close to their bases in the Central-North, East, and Sahel regions. The attack carried out in mid-February against the locality of Titao, in the north of the country, resulted in the deaths of 80 soldiers and militiamen as well as at least 20 civilians, illustrating the persistent operational capacity of armed groups despite the intensification of military operations.

In Mali, the military junta has had to face an unprecedented economic blockade orchestrated by JNIM between September 2025 and early 2026. Insurgents systematically intercepted fuel convoys coming from Côte d'Ivoire and Senegal, even going so far as to set fire to a dozen tankers in a single operation. While the blockade eased in early 2026 without a clear explanation, its psychological impact remains profound among the population of Bamako, as evidenced by Aissata, a vendor in a supermarket in the capital: "And tomorrow? What will happen if the blockade returns or if the terrorist group decides to attack the market or any infrastructure in the city?"

This security deterioration directly contradicts the promises made by the military leaders of the three AES countries, who justified their coups d'état by the inability of their democratic predecessors to ensure security. As an anonymous professor from the University of Legal and Political Sciences in Bamako, speaking on condition of anonymity for fear of reprisals, points out: "The Malian army is stretched to its limits by persistent terrorist attacks and defections to JNIM. The junta does not seem to have a response to the terrorist expansion, not even from its counterparts in Niger and Burkina Faso."

The implications of this situation for regional stability are considerable. Without reconciliation between the AES and ECOWAS, two major risks loom. On one hand, the escalation of geopolitical tensions could lead member states into direct interstate military confrontations, potentially plunging West Africa into a regional war that would not serve the counter-terrorism objectives of any party. Such a conflict would create precisely the operational space that armed groups need to expand their operations in the face of fractured and distracted security responses. On the other hand, this confrontation risks transforming West Africa into a new theater of rivalry between global powers, with an AES supported by Russia on one side, and an ECOWAS backed by the United States and France on the other. In the context of an emerging new Cold War, the use of the veto by these global actors in the United Nations Security Council could further complicate conflict resolution, with profoundly destabilizing consequences for the region.

The fundamental question remains that of the intrinsic effectiveness of the militarized approach to the Sahelian insurgencies. Two decades of international security engagement in the region, costing over $3.3 billion in American assistance according to the Security Assistance Monitor, have not stemmed the advance of jihadist groups. The accumulation of deployed forces—from the French Barkhane operation to European training missions, through the UN MINUSMA and now the competing architectures of the AES and ECOWAS—has not produced the expected results in terms of reducing violence and restoring state authority.

The challenge facing West Africa transcends military capabilities. It requires a multidimensional approach that integrates local governance, economic development, social justice, and political reconciliation. As long as responses remain primarily military and regional rivalries prevail over cooperation, terrorist groups will continue to exploit the political and social fractures that fuel the insurgency. ECOWAS, the continent's most experienced regional organization in security matters, has the diplomatic capacity necessary to negotiate an operational concept that respects the sovereignty of the AES. It remains to be seen whether it will be able to regain control of its security agenda and define the terms of external engagement, or whether the region will sink into a spiral of militarization that will only deepen the instability it claims to combat.