Renewed Jihadist Rivalry Threatens to Reshape the Eastern Sahel

JNIM and Islamic State confrontations expose a contested regional balance of power beyond government control.

SECURITY UPDATE | MALI – BURKINA FASO

Executive Summary

Renewed fighting between al-Qaeda-affiliated Jama'at Nusrat al-Islam wal-Muslimin (JNIM) and Islamic State Sahel Province (ISSP) around Tessit in eastern Mali and Oudalan province in northern Burkina Faso signals a potentially significant escalation in the struggle for control of the tri-border region.

Reports from 9 October describe sustained engagements and substantial casualties, with preliminary monitoring indicating approximately 60 fighters killed, including around 50 JNIM members. These figures remain unverified, and competing claims of victory prevent a reliable determination of the battlefield outcome.

The significance extends beyond the immediate losses. Both organisations are competing for territorial access, local influence and the ability to impose authority over communities in areas where government control remains limited. A prolonged confrontation could divert resources from attacks against state forces but may also produce new patterns of violence and displacement.

The principal risk is that inter-jihadist fighting will redistribute armed influence rather than reduce the overall jihadist threat.

Renewed Fighting in the Tri-Border Region

The reported confrontations have centred on the Tessit area and several locations in Burkina Faso's Oudalan province, including areas around Tin-Akoff and Oursi.

Preliminary monitoring describes engagements lasting more than two hours. Claims that the fighting continued across multiple fronts into 11–12 October, accompanied by reinforcement movements and senior commander casualties, have not been independently established.

The fighting follows years of competition between JNIM and Islamic State over territory, recruitment, taxation, grazing routes and community allegiance. Although ideological differences remain important, control over local populations and economic networks is central to the rivalry.

A decisive victory for either organisation would potentially alter the security environment across eastern Mali, northern Burkina Faso and western Niger. However, the available evidence does not yet establish that such a shift has occurred.

Strategic Assessment

JNIM retains a broader geographical presence and operational reach across the Sahel. Islamic State nevertheless remains capable of challenging its rival in areas where it has established local networks and fighting capacity.

The reported scale of the October engagements suggests that the rivalry remains an active military contest rather than a secondary dispute between organisations principally focused on government targets.

A sustained Islamic State offensive could force JNIM to redirect fighters and logistical resources away from other operational theatres. Conversely, a successful JNIM counteroffensive could consolidate its influence in the borderlands and further constrain Islamic State's territorial ambitions.

Neither outcome necessarily benefits regional governments. Territory vacated by one jihadist organisation may be occupied by another, while communities caught between rival groups face heightened risks of collective punishment, forced recruitment and displacement.

The ability of armed organisations to mobilise and engage in sustained combat across these borderlands also highlights the continuing limitations of territorial control exercised by the Alliance of Sahel States (AES).

The Wider Malian Security Environment

The confrontations coincide with an important development elsewhere in Mali. On 6 October, Malian forces supported by Russia's Africa Corps re-entered Kidal following the withdrawal of the Azawad Liberation Front (FLA). The return represented a symbolic political success for Bamako, although the withdrawal occurred without a major ground battle for the town.

ASA addressed this development separately in its 9 October report, Mali: The Return to Kidal.

The two developments illustrate different dimensions of Mali's fragmented security environment. Government forces have demonstrated the capacity to regain an important urban centre, while rival jihadist organisations continue contesting influence across rural border regions.

There is currently insufficient evidence to establish a direct operational relationship between the withdrawal from Kidal and the fighting around Tessit. Nevertheless, simultaneous pressures across northern and eastern Mali complicate the allocation of resources for all armed actors.

Strategic Outlook

The immediate trajectory will depend on whether the reported engagements develop into sustained territorial offensives or remain concentrated clashes.

Three developments warrant particular attention:

• Reinforcement and redeployment: Evidence that either organisation is moving substantial forces from other regions would indicate a broader operational commitment.
• Territorial consolidation: Persistent occupation of settlements, control of movement corridors or the establishment of new taxation arrangements would provide stronger evidence of a changing balance of power than casualty claims alone.
• Civilian consequences: Increased displacement, retaliatory attacks and coercion of communities could indicate that the confrontation is expanding beyond direct combat between armed groups.

A temporary reduction in jihadist attacks against state forces is possible if both organisations concentrate resources against each other. Such an opening would not necessarily be durable and should not be interpreted as evidence of declining insurgent capability.

ASA Bottom Line

The October fighting highlights an increasingly important distinction between jihadist territorial competition and the broader struggle between insurgent organisations and Sahelian governments.

JNIM and Islamic State can inflict significant losses on one another without materially strengthening government authority. Indeed, their rivalry may further destabilise communities already beyond effective state protection.

The critical indicator will not be which organisation claims victory at Tessit, but whether either can convert battlefield gains into sustained territorial control.

Until that becomes clear, the fighting should be regarded as a potentially significant escalation, not yet a confirmed strategic turning point.

Source note: This assessment draws on preliminary conflict-monitoring reports, contemporary regional reporting and independently corroborated reporting on Kidal. Casualty figures and claims of continued multi-front engagements remain provisional. No confidential field reporting has been incorporated.