Nigerian forces backed by warplanes invaded Islamist group Boko Haram’s last known stronghold, the Sambisa forest, on Wednesday, in an effort to finally defeat their six-year-old insurgency.

A report by Reuters disclosed the fresh move against the hoodlums, quoting military sources.

Armies from Nigeria and neighbouring Chad, Niger and Cameroon have in the past two months launched a concerted push to try to crush the insurgents, who have killed thousands and kidnapped hundreds in their battle to establish an Islamic state.

The Sambisa forest in northeast Nigeria, a vast former colonial game reserve, is about 100 km (60 miles) from the village of Chibok from where Boko Haram abducted more than 200 secondary school girls a year ago. Intelligence officials had believed that this was where they were being held, although U.S. reconnaissance drones have failed to find them.

United Nations Special Representative for West Africa, Mohamed Ibn Chambas, said this month that Boko Haram militants seeking shelter in the Sambisa Forest may be using some of the captured girls as human shields.

A spokesman for the military was not immediately available for comment.

An official in the Chadian army said Chadian and Cameroonian troops were ready to attack Sambisa, which lies near the Cameroon border, from the other side and would move in soon.

It was gathered that Chadian troops were assembling in Mora, northern Cameroon, ahead of the joint operation. A Cameroonian army official confirmed the planned attack.

The militants controlled an area the size of Belgium at the start of the year, but have since lost much of that ground. Yet they remain a deadly threat to civilians, as illustrated recently when they slit the throats of 12 people in northeast Nigeria as the army was trying to evacuate the area around the former Boko Haram headquarters of Gwoza.

Failure to crush Boko Haram or protect civilians may be one of the reason President Goodluck Jonathan lost an election on March 28 to Muhammadu Buhari, who has pledged to spare no effort in battling the militants after he is sworn in on May 29.
“Buhari also said he would do everything possible to rescue the Chibok girls, but could not promise to find them.”