A large, multi-pronged ISWAP force staged an attack on a Nigerian Army convoy and base in Mainok, Borno State. The operation was carried out in several phases. First, the militants ambushed a military convoy transporting newly acquired weapons to Maiduguri, using their own MRAPs and rocket-propelled grenades to overwhelm the escort, seizing weapons and two MRAPs. They then divided into three groups: one group stormed and overran the 156 Task Force Battalion base, destroying a T-55 battle tank and a BTR-4EN, and setting it on fire; a second group set up an ambush on the Damaturu road, killing three soldiers and injuring nine others; a third group did the same on the Jakana-Mainok road. When the military called in air support, a NAF fighter jet, operating with flawed intelligence and unable to distinguish between friendly forces and insurgents dressed in similar military camouflage, mistakenly bombed a gun truck carrying troops on a reinforcement mission, killing 20 soldiers. The insurgents withdrew, setting fire to the local police station in a rage before fleeing to their camp around the Lawan Mainari axis.
25 Apr 2021 · Mainok, Kaga, Borno
Deaths
53
Injured
14
Kidnapped
0
Total casualties
67
Perpetrators
ISWAP
Response
The Nigerian Air Force scrambled fighter jets to provide air support. However, flawed intelligence and the inability of pilots to distinguish between friendly forces and insurgents dressed in similar camouflage led to a friendly fire airstrike that killed 20 soldiers. The Nigerian Army issued an official statement acknowledging the attack but downplayed the scale of the loss.
Displacement
0
Socioeconomic drivers
The attack was part of a pattern of ISWAP launching major offensives to expand its control and demoralize the Nigerian military.
Trajectory
The attack marked a significant escalation in ISWAP’s tactical sophistication: the use of captured MRAPs to ambush a convoy delivering new MRAPs was a devastatingly ironic blow. The friendly fire incident, though not unique, was one of the deadliest single incidents of fratricide in the conflict, and it severely undermined public confidence in the military’s operational competence. The Army’s attempt to underplay the losses by claiming only seven soldiers died was widely dismissed, and ISWAP later released propaganda videos showing the captured armoured vehicles, further humiliating the military.
Cycle notes
This incident is consistent with a broader operational pattern observed in previous Islamic State West Africa Province (ISWAP) attacks, including 18 November 2018 – the Metele attack involving the overrunning of a forward operating base and seizure of heavy weaponry; 18 July 2019 – the Jakana ambush followed by a secondary assault on military positions along the Maiduguri axis; 30 August 2019 – the Gasarwa convoy ambush executed with rocket-propelled grenades and coordinated fire to disrupt troop movement; 25 March 2020 – the Goneri base attack characterized by a multi-pronged offensive and temporary insurgent control; and 13 June 2020 – the Monguno assault involving simultaneous convoy interception and base infiltration. Collectively, these incidents reflect a recurring operational pattern in which ISWAP conducts coordinated, multi-phase assaults that combine highway ambushes with subsequent attacks on military installations. The incident further underscores the group’s sustained objective of degrading military capability through the capture of equipment and the infliction of mass casualties. It also highlights systemic coordination challenges within state response operations, as the deployment of air support in the aftermath resulted in a fatal friendly fire incident that significantly compounded military losses and contributed to broader operational disarray.
Pattern
Convoy Ambush & Military Base Assault
Sources
Related — Armed Attack
In the early hours of Sunday, dozens of ISWAP (Islamic State West Africa Province) fighters in gun trucks and on motorcycles attacked the military base in Ajiri, a town in Mafa LGA about 20 km (12 miles) from Maiduguri. Troops fought a two‑hour gun battle, but the insurgents eventually breached the base, forcing troops to withdraw and escape with weapons. The commanding officer of the base was killed; at least six civilians caught up in the fighting were also killed. The attack was one of two simultaneous ISWAP operations that weekend — the other occurred in Rann, Kala‑Balge LGA, where insurgents in six gun trucks attacked a base but were repelled by troops using artillery.
One person was assassinated in the Lassandi area of Jalingo. In a separate incident, Dr. Wallace George, a medical doctor with the Federal Medical Centre, was attacked in his house behind the Catholic Cathedral, Mile 6, Jalingo, by unidentified gunmen.
In one of the deadliest soft‑target attacks of the early insurgency, two Boko Haram gunmen on motorcycles hurled three improvised explosive devices (IEDs) into a crowded outdoor beer garden in the Dala Kabompi ward of Maiduguri. As patrons fled in panic, the assailants opened fire indiscriminately with automatic weapons before speeding away. The attack occurred during peak social hours, maximising civilian casualties.