I see this as a very significant victory for the anti-ISIS forces and its evil ally, Boko Haram.

IB Times:
Some 800 Boko Haram fighters have . . .  surrendered to the Nigerian military in the past three weeks. The director of defense information Brig. Gen. Rabe Abubakar apparently revealed the information Wednesday in an interview with Nigerian newspaper the Punch, one day after the Nigerian military announced the establishment of a rehabilitation camp for the former terrorists.
“I can confirm that about 800 of the Boko Haram members have surrendered to the military,” Abubakar reportedly told the local newspaper.
The new rehabilitation camp is for those militants who have surrendered and are repentant. The camp will provide vocational training to help reintegrate them into society and contribute to economic growth. In an online statement released Tuesday, the Nigerian military urged other Boko Haram members to abandon the Islamic insurgency and warned “that the final onslaught against the remnant group of the terrorists would continue unabated and would not relent until the power of evil forces in the northeast is completely neutralized.”