MAIDUGURI, Nigeria—In a video, Boko Haram fighters and their families march in single file out of the tall grass of Nigeria’s Sambisa Forest, Off camera, members of the Nigerian Army greet then, in one of several mass surrenders taking place in three countries. The video of several hundred women and children and a few men walking out of a meadow on Aug. 15 was verified for The Epoch Times by David Otto, a UK-based consultant to the Nigerian army. Those surrendering are seeking safety with the government, fleeing the danger posed by the ascendant Islamic State of West Africa (ISWA) insurgency that defeated the Jamāʿat Ahl al-Sunnah li-l-Daʿawah wa al-Jihād  (JAS) faction (commonly known as Boko Haram) in May, according to Otto. JAS leader Abubakar Shekau committed suicide on May 19, as reported by The Epoch Times. The ISWAP group assimilated the remaining JAS fighters who would swear allegiance at the …