The Islamist group Boko Haram (BH) was founded in the early 2000s and less than two decades has transformed from a “Nigerian” movement into regional one. Tactical, strategic ideological differences between leaders of BH have repeatedly led to its splits separate factions; most serious occurred 2016, when split Islamic State West Africa Province Jamaatu Ahl-is-Sunna Lidda’Awati Wal-Jihad, latter...