Bloodshed reborn: Boko Haram’s deadly comeback threatens stability in Nigeria   

A resurgence of Boko Haram attacks is shaking Nigeria's northeast, as Islamic extremists have repeatedly overrun military outposts, mined roads with bombs, and raided civilian communities since the start of the year, raising fears of a possible return to peak Boko Haram-era insecurity despite the military's claims of successes.

Boko Haram, Nigeria’s homegrown jihadis, took up arms in 2009 to fight Western education and impose their radical version of Islamic law. The conflict, now Africa's longest struggle with militancy, has spilled into Nigeria's northern neighbours, resulted in the death of around 35,000 civilians and the displacement of more than 2 million others, according to the United Nations.

In the latest attack late last week in the village of Gajibo in Borno state, the epicentre of the crisis, the extremists killed nine members of a local militia that supports the Nigerian military, after soldiers deserted the base when becoming aware of the insurgents' advance, according to the group's claim and local aid workers. That is in addition to roadside bombs and deadly attacks on villages in recent months.

Boko Haram has since broken into two factions. One of the them is backed by the Islamic State group and is known as the Islamic State West Africa Province, or ISWAP. It has become notorious for targeting military positions and has overrun the military on at least 15 occasions this year, killing soldiers and stealing weapons, according to an Associated Press count, experts and security reports reviewed for this story.

On the other hand, the Jama'atu Ahlis Sunna Lidda'awati wal-Jihad, or JAS, faction has increasingly resorted to attacking civilians and perceived collaborators, and thrives on robberies and abductions for ransom.

In May, ISWAP struck outposts in Gajibo, Buni Gari, Marte, Izge, Rann, and launched a twin assault on the Nigeria-Cameroon joint base in Wulgo and Soueram in Cameroon. Other attacks this year have hit Malam Fatori, Goniri, Sabon Gari, Wajiroko and Monguno, among others. The group often attacks at night.

Malik Samuel, senior researcher at non-profit Good Governance Africa, said ISWAP's success is as a result of its territorial expansion following gains against rival JAS as well as a decentralised structure that has enhanced its ability to conduct "coordinated, near-simultaneous attacks across different regions,” Samuel said.

 “The unpredictability of attacks under this framework illustrates ISWAP’s growing strategic sophistication,” Samuel said.

External support from IS in Iraq and Syria is also a critical resource to the militants, said Samuel, who has interviewed ex-fighters. Such support is evident in ISWAP's evolving tactics, including nighttime raids, rapid assaults with light but effective weaponry, and the use of modified commercial drones to drop explosives, Samuel said.

Ali Abani, a local nonprofit worker familiar with the military operations in Borno's strategic town of Dikwa, said that the army bases are understaffed and located in remote areas, making them vulnerable to attacks. “When these gunmen come, they just overpower the soldiers,” Abani said. Reinforcements, either in the form of air support or nearby ground troops, are often too slow to arrive, allowing the militants enough time to strip the outposts of weapons needed to bolster their arsenal, he added, recalling a May 12 attack during which soldiers fled as they were outnumbered, leaving the extremists to cart away weaponry. There also have been reports of former militants who continued to work as informants and logistics handlers after claiming to have repented.

At its peak in 2013 and 2014, Boko Haram gained global notoriety after kidnapping 276 Chibok schoolgirls and controlled an area the size of Belgium.

While it has lost much of that territory on the back of military campaigns, the new surge in Boko Haram attacks has raised fears about a possible return to such a gloomy past.

Borno Gov. Babagana Zulum warned recently of lost gains after raising concerns that military formations in the state are being dislodged “almost on a daily basis without confrontation.”            Federal lawmakers continue to highlight the extremists' growing sophistication and advanced weaponry, calling on the government to bolster the capabilities of the military.

The Nigerian military didn't respond to a request for comment. Last Friday, senior commanders visited one of the troubled areas, Gamboru on the border with Cameroon, promising the deployment of more troops to combat Boko Haram.