U.S. and Nigeria Conduct Follow-Up Airstrikes on ISIS in Africa After Killing Senior Leader

On May 15, 2026, a joint U.S.-Nigerian "precision air-land operation" killed Abu-Bilal al-Minuki — described by the Pentagon as the Islamic State's global number two — in a compound strike in the Lake Chad Basin of northeastern Nigeria [1][2]. Two days later, follow-up airstrikes near Metele in Borno State killed more than 20 additional ISWAP fighters [3][4]. No U.S. or Nigerian forces were harmed in either operation.

The strikes represent the latest phase of an expanding American military campaign in Nigeria that began with Tomahawk missile strikes on ISIS camps in Sokoto State on Christmas Day 2025 [5]. They raise a cascade of questions — about legal authority, strategic effectiveness, civilian protection, and whether foreign airpower can resolve an insurgency with deep roots in governance failure and economic deprivation.

Who Was Abu-Bilal al-Minuki?

U.S. Secretary of Defense Pete Hegseth identified al-Minuki as the Senior ISIS General Directorate of Provinces Emir — the person responsible for overseeing attack planning, directing hostage-taking, and managing financial operations across ISIS's global network [1]. Nigerian military spokesman confirmed that al-Minuki also guided ISIS media operations, economic warfare, and the development of weapons, explosives, and drones [2].

Al-Minuki was killed alongside "several of his lieutenants" in what AFRICOM described as a three-hour nighttime operation [6]. The intelligence that located his compound relied on human intelligence (HUMINT), which analysts note is the hardest form of intelligence for a target to detect or counter [7].

Yet the operation's most conspicuous gap is the figure it did not reach. Abu Hafs al-Hashimi al-Qurashi, the fifth and current ISIS caliph since August 2023, remains at large [7][8]. Very little is known about Abu Hafs's identity — the West Point Combating Terrorism Center has described him as the third in a line of "caliphs of the shadows" whose real names and locations are unknown to Western intelligence agencies [9]. His survival underscores a structural challenge: ISWAP operates not from a single headquarters but from dozens of small, shifting camps scattered across Lake Chad islands and the Borno bush, using deep local networks that the Nigerian military has struggled to penetrate for over a decade [7].

ISWAP: Size, Structure, and Territorial Reach

ISWAP is the Islamic State's largest branch. UN sanctions monitors estimate its ranks at between 8,000 and 12,000 members, operating primarily across the Lake Chad Basin spanning Nigeria, Niger, Cameroon, and Chad [10][11]. The International Crisis Group has estimated that between 800,000 and 3 million civilians live under some degree of ISWAP governance in rural areas where the Nigerian state has limited presence [10].

The group's command structure is semi-decentralized. A wali (governor) leads the province, but a shura (consultative council) holds significant power, and appointments to senior positions require approval from ISIS's core leadership [10]. This structure means that individual leadership losses, while disruptive, do not necessarily disable the organization. As Al Jazeera reported, ISWAP leaders "are not irreplaceable due to the group's decentralised command structure" [12].

ISWAP escalated operations markedly in early 2026, launching at least twelve coordinated attacks on military bases and infrastructure across Borno State in the first three months of the year. Analysts at the Soufan Center noted that the group's use of kinetic drones, increased media output, and influx of foreign fighters suggest growing logistical support from ISIS core [13].

Africa: The Islamic State's New Center of Gravity

The Nigeria strikes occur against a backdrop of a broader geographic shift. Over two-thirds of all Islamic State global activity in 2025 was recorded in Africa, according to ACLED data [14]. The movement maintains active affiliates across multiple theaters.

Source: ACLED / Africa Center for Strategic Studies

Data as of Dec 31, 2025CSV

The Lake Chad Basin recorded the highest fatality toll, with 4,779 deaths linked to militant Islamist activity — a 28 percent increase over the prior year and the deadliest period since 2015 [15]. The Central Sahel (Burkina Faso, Mali, Niger) saw an estimated 2,000 to 3,000 ISIS Sahel Province fighters expand territorial control in the Liptako-Gourma tri-border region [14]. ISIS affiliates also remain active in Somalia, Mozambique's Cabo Delgado province, and the Democratic Republic of Congo [14][16].

Some analysts argue, however, that the Africa threat framing can be overstated. The ICCT noted that while ISIS activity in Africa is real and growing, the movement faces a "waning global response" partly because Western governments have shifted attention elsewhere [16]. The question of whether ISIS in Africa poses a direct threat to U.S. homeland security — versus a regional threat to African populations — shapes the debate over the appropriate scale of American military involvement.

Legal Authority: The AUMF Question

The legal basis for U.S. strikes in Nigeria remains contested. The December 2025 strikes were conducted "at the direction of the President of the United States and the Secretary of War, and in coordination with Nigerian authorities" [5][17]. The May 2026 operations were similarly framed as conducted with the "explicit approval" of Nigerian President Bola Ahmed Tinubu [6].

The 2001 Authorization for Use of Military Force (AUMF), passed after 9/11, has been invoked by successive administrations to justify counterterrorism operations in multiple countries. However, its applicability to Nigeria is debatable. The AUMF authorized force against those who "planned, authorized, committed, or aided" the September 11 attacks — and while the executive branch has expanded its interpretation to cover ISIS and affiliates, legal scholars have questioned whether this stretches the statute beyond recognition [18][19].

CSIS analysis noted that the administration offered multiple justifications for the strikes: counterterrorism under AFRICOM's mandate to "protect Americans and disrupt violent extremist organizations," as well as President Trump's framing around alleged persecution of Christians in Nigeria [17]. Nigerian officials and analysts pushed back against the Christian persecution narrative, emphasizing that ISWAP targets all faiths [17].

Under the War Powers Resolution, the president is required to notify Congress within 48 hours of committing forces to hostilities. Historical reporting from the Costs of War project at Brown University documented that in past African operations — including in Mali and Tunisia — the executive branch has conducted strikes without reporting to Congress or citing the 2001 AUMF [18].

The Decapitation Debate: Does Killing Leaders Work?

The al-Minuki strike embodies a strategy that Washington has employed for two decades: targeting senior terrorist leaders to degrade organizational capacity. The empirical record on this approach is mixed at best.

Jenna Jordan's research at Stanford, examining over a thousand instances of leadership targeting across groups including Hamas, al-Qaeda, Shining Path, and ISIS, found that decapitation produces highly variable results [20]. A separate study published in International Security by MIT Press concluded that "terrorist groups survive decapitation strikes" more often than not, with organizational resilience depending on factors like group age, size, and ideological cohesion [21].

Applied to ISIS specifically, scholars at the ICCT observed that while ISIS lost multiple senior leaders between 2014 and 2019, the organization's territorial losses in Iraq and Syria were driven primarily by sustained ground campaigns, coalition airpower, and the severing of supply lines — not by leadership kills alone [22]. The group's current pivot to Africa, despite years of leadership attrition, illustrates the pattern.

War on the Rocks analysis argued that "killing terrorist leaders is no silver bullet" and that effective counterterrorism requires dismantling supply lines, attacking logistical capabilities, and denying insurgents external support, with decapitation as merely one tactic within a wider strategy [23].

For ISWAP, the question is whether al-Minuki's death disrupts operational planning or simply triggers a leadership succession that ISWAP's shura council is designed to manage. Given the group's decentralized structure and its recent operational escalation, the latter outcome cannot be ruled out.

Billions in Aid, Persistent Abuses: The U.S.-Nigeria Security Relationship

The strikes are embedded in a broader security partnership. The United States has provided, facilitated, or approved more than $2 billion in security assistance and military equipment to Nigeria and has conducted more than 41,000 training courses for Nigerian military personnel [24][25].

Source: U.S. State Department / CIVIC

Data as of Dec 1, 2025CSV

Major recent sales include 12 A-29 Super Tucano aircraft ($497 million), a pending sale of 12 AH-1Z Attack Helicopters ($997 million), and a proposed munitions package worth $346 million [24][26]. The State Department's International Military Education and Training (IMET) program allocated approximately $5 million to Nigeria between FY 2019 and FY 2023 [25].

This assistance flows to a military with a documented record of serious human rights violations. Between 2011 and 2021, at least 10,000 civilians died in Nigerian military custody after being detained in connection with the Boko Haram insurgency, according to research cited by Responsible Statecraft [27]. In December 2020, the ICC's Chief Prosecutor concluded a preliminary examination finding reasonable grounds to believe that both Boko Haram and Nigerian security forces committed war crimes and crimes against humanity [28].

Human Rights Watch called in February 2026 for rights safeguards as a precondition for expanded security cooperation, noting continued reports of civilian casualties, enforced disappearances, sexual violence, and forced displacement by Nigerian forces [26]. Under the Leahy Law, U.S. security assistance is prohibited to foreign military units implicated in gross human rights violations — but enforcement has been inconsistent [26][27].

Nigeria's own airstrike record includes a January 2017 incident in which a Nigerian Air Force jet bombed an internally displaced persons camp in Rann, Borno, killing 115 civilians after mistaking it for a Boko Haram encampment [28]. The Global Centre for the Responsibility to Protect documented that the government "intensified military operations in affected areas, including through indiscriminate airstrikes, which have resulted in hundreds of civilian casualties" [28].

The Humanitarian Toll

The conflict's human cost extends far beyond combatant deaths. More than 35,000 people have been killed in clashes involving state security forces and Boko Haram/ISWAP since 2009 [15]. An estimated 2.8 million people are displaced across the Lake Chad Basin, including 2.3 million internally displaced within Nigeria alone [15][29].

Source: UNHCR Population Data

Data as of Dec 31, 2025CSV

Some 9.2 million people across Nigeria, Chad, Niger, and Cameroon are in immediate need of humanitarian assistance [29]. Violence has forced the closure of 1,827 schools across the basin, while humanitarian actors received just 19 percent of the funding required for 2025 [29].

Nigeria's conflict sits within a broader displacement crisis. UNHCR data shows Nigeria's neighbors — including Chad, Cameroon, and Niger — hosting hundreds of thousands of refugees who have fled the insurgency, adding to already strained systems in countries that face their own security challenges [29].

Sovereignty, Legitimacy, and the Case Against Militarization

Nigerian reactions to U.S. military operations on their soil have been divided. The Tinubu government framed the partnership as a sovereign choice — NBC News reported that Nigeria "averts unilateral U.S. action by cooperating on airstrikes" [30]. Nigerian military officials emphasized the strikes as a product of recently formed intelligence-sharing efforts [6].

But criticism has been sharp. Islamic cleric Sheikh Ahmed Gumi condemned the strikes and those Nigerians who supported them [31]. The South African-based Economic Freedom Fighters issued a statement opposing U.S. airstrikes on African soil [31]. Writing for Al Jazeera, analysts argued that "Nigerians do not need the US to bomb their country into security and stability; they need autochthonous reform with localised long-term support to rebuild trust, restore livelihoods, and strengthen state institutions" [32].

The ISS Africa analysis characterized the U.S. strikes as "a constrained choice for Nigeria," arguing that Abuja accepted American involvement partly to avoid the possibility of unilateral U.S. action [33]. The New Humanitarian questioned whether the December 2025 strikes "hit the right target," noting that errant missiles struck a farmer's field in Tambuwal, Sokoto State, and that poor intelligence and civilian risk remain unresolved concerns [34].

Regional neighbors have expressed cautious support for counter-ISWAP operations but have not uniformly endorsed the U.S. role. Chad, which lost its president Idriss Déby in a clash with rebels in 2021, maintains its own military operations against ISWAP [15]. The Multinational Joint Task Force — comprising Nigeria, Niger, Chad, Cameroon, and Benin — has been the primary regional framework for combating the insurgency, and some analysts worry that bilateral U.S.-Nigeria operations could undermine this multilateral approach.

The structural argument against militarization holds that the insurgency's roots lie in decades of governance failure, economic marginalization, and environmental degradation in northeastern Nigeria. The UNDP has emphasized that "restarting lives, recovering livelihoods" requires investment in development, not just security [29]. The Conversation noted that U.S. air strikes carry "possible windfalls, as well as dangers" — the danger being that foreign military action alienates local populations and forecloses political solutions [35].

What Comes Next

The killing of al-Minuki is a tactical success for the U.S.-Nigeria partnership. Whether it translates into strategic progress against ISWAP depends on factors that airstrikes alone cannot address: the group's ability to reconstitute leadership, the Nigerian government's capacity to extend governance into areas ISWAP controls, the flow of foreign fighters and resources from ISIS core, and the willingness of international donors to fund humanitarian and development responses at the scale the crisis demands.

Pentagon spokesman Sean Parnell framed the follow-up strikes as proof that "Islamic State militants cannot evade U.S. retaliation by operating in remote regions of Africa" [4]. But the fact that ISWAP governs territory where the Nigerian state cannot, fields thousands of fighters the military has not defeated in over a decade, and draws on a global network whose caliph remains unidentified — let alone located — suggests the campaign's hardest questions remain unanswered.