Boko Haram (ISIS West Africa Province)
Founded in 2002 by Islamist cleric Mohammad Yusuf as a mostly non-violent Salafist group in Borno state in northeasten Nigeria, Boko Haram has become one of the world's most violent terrorist groups. Prior to 2009, the group consisted of primarily unemployed and impoverished Islamic students and clerics. At that time, it did not engage in widescale violent attacks on the government. Rather, it retreated to a camp near the border with Niger to create its own Islamic society based on...