The Sahel Is Falling — and the Rest of West Africa Could Follow

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In late April, Mali faced one of its most serious coordinated assaults in years.

On 25 April, fighters from the al-Qaeda-linked Jama’at Nusrat al-Islam wal-Muslimin (JNIM) and the Tuareg-led Azawad Liberation Front (FLA) struck military targets at more than half a dozen locations, including Kati, near Bamako airport, Mopti, Sévaré and Gao. The FLA also claimed to have retaken Kidal, although the army described its move there as a tactical repositioning.

In Kati, a heavily fortified garrison town near the capital, the attackers reached the home of Defence Minister Sadio Camara, who was killed in the assault. On 4 May, junta leader Assimi Goïta took over the defence portfolio. The United States Embassy in Bamako had urged American citizens to shelter in place as the attacks unfolded.

For a government that came to power promising to restore security, the symbolism was difficult to miss. One of the men at the centre of Mali’s military government had been killed at his home while armed groups attacked targets across the country.

A Country Under Siege

The April attacks followed years of deteriorating security in Mali. JNIM has expanded its operations across large parts of the country, while the FLA has continued its fight for greater control in the north. The two groups have different political objectives, but their ability to coordinate against the military government has created a more difficult challenge for Bamako.

The junta has responded by turning increasingly towards Russia after pushing out French forces and ending cooperation with several Western partners. Russia’s Africa Corps has provided military support, but the attacks in April exposed the limits of that approach. The government still faces armed groups capable of moving across large areas, attacking military positions and disrupting important routes.

That matters because Mali’s problem has never been purely military. Armed groups have exploited weak state institutions, limited government presence, local grievances and difficult terrain. Military operations can recapture territory or disrupt an insurgent network, but holding that territory requires a functioning state and relationships with the communities living there. The same vulnerabilities are now appearing across the central Sahel’s southern frontier, bringing the consequences of its prolonged conflict closer to the Gulf of Guinea states.

The Numbers Tell the Story

According to data from the Armed Conflict Location & Event Data Project (ACLED) covering 1 January to 14 August 2026, the Horn of Africa recorded 2,477 political-violence events involving Islamist groups. The Sahel and coastal West Africa recorded 2,125 events, followed by the Lake Chad Basin with 1,625.

The fatality figures are even more striking. The Sahel and coastal West Africa recorded 7,795 reported fatalities during the period, compared with 4,408 in the Lake Chad Basin and 3,870 in the Horn of Africa. Somalia alone accounted for 2,402 events, while Nigeria, Burkina Faso and Mali each recorded more than 800.

The figures put the scale of the crisis into perspective. The Horn of Africa saw more recorded events, but the reported death toll in the Sahel and coastal West Africa was substantially higher. At the same time, the conflict is no longer confined to the countries where Islamist insurgencies first became entrenched. Armed groups are operating along borders linking the central Sahel with the Gulf of Guinea, creating new pressure on states that have spent years trying to keep the violence out.

The Violence Is Moving South

Northern Benin has become an increasingly important battleground. JNIM has carried out repeated attacks against military positions around Pendjari National Park and the wider W-Arly-Pendjari complex. Analysts have described the Benin–Niger–Nigeria borderlands as an emerging frontline for militant activity, with armed groups using the area to connect operations across the Sahel and coastal West Africa.

The geography gives militants opportunities that national security forces struggle to counter. The borders are long and porous, while communities on either side often have close ethnic, commercial and family ties. Those connections can help armed groups move people, weapons and money. They can also provide access to communities where governments have historically had only a limited presence.

Northern Benin is particularly important because it sits between the central Sahel and Nigeria. If militant groups establish durable networks there, they gain access to a much larger and more economically important part of West Africa. The threat would also become harder for any single government to contain.

That is already becoming a regional problem. Benin has had to strengthen its military presence in the north while working with neighbouring countries to prevent fighters from crossing its borders. Nigeria faces its own long-running insurgency in the north, creating another environment in which armed groups can exploit weak border controls and local insecurity.

The result is a security belt stretching from Mali and Burkina Faso towards the Gulf of Guinea. This does not mean that coastal West Africa is about to experience the same level of violence as the central Sahel. It does mean, however, that some of the conditions that allowed insurgencies to grow farther north are appearing in areas once considered more secure.

The Next Frontline

The regional response is already under strain. France has withdrawn from much of the Sahel, while the G5 Sahel security framework has collapsed. Mali, Burkina Faso and Niger have left the Economic Community of West African States (ECOWAS) and formed the Alliance of Sahel States, while Russia has expanded its security role. Yet the militant threat has continued to evolve, and the Benin–Niger–Nigeria borderlands are emerging as a significant new frontline.

For coastal West Africa, the immediate challenge is to prevent these border areas from becoming permanent operating bases for armed groups. That requires more than military deployments. Governments need better intelligence sharing, stronger cross-border cooperation and a sustained presence in communities where the state has historically been weakest.

The cost of waiting is likely to be much higher. Once an armed group has established local networks, recruitment channels and supply routes, removing it becomes considerably more difficult. The governments of coastal West Africa therefore face a narrowing opportunity to contain the problem while it is still concentrated in relatively remote border regions.

The Sahel’s crisis is no longer a problem that can be left to Mali, Burkina Faso and Niger to solve. The violence is already testing the countries to their south, and the response from those countries will determine whether the crisis remains concentrated in the Sahel or develops into a much wider West African security challenge.

Mali was a warning. The window to contain the violence is closing, and the countries farther south may soon find themselves confronting a crisis that has already taken root.

Tags

Sahel West Africa Security