Boko Haram insurgency insurgency spread to neighboring Cameroon, Chad, and Niger thus becoming a major regional conflict. In 2015, a coalition offensive forced Boko Haram to retreat into the Sambisa Forest. The insurgency took place within the context of long-standing issues of religious violence between Nigeria's Muslim and Christian communities. Boko Haram has been called the world's deadliest terrorist group, in terms of the number of people it has killed. Nigeria was amalgamated both the Northern and Southern protectorate in 1914, only about a decade after the defeat of the Sokoto Caliphate and other Islamic states by the British which were to constitute
Haram considered "haram". A similar principle is that the sin of "haram" is not limited to the person who engages in the prohibited activity, but the sin also extends to others who support the person in the activity, whether it be material or moral support. The five categories of الأحكام الخمسة (al-ahkam al-khamsah) or the hierarchy of acts from permitted to non-permitted are: The two types of haram are: The religious term "haram", based on the Quran, is applied to: Linguistically, the root of the term haram [compare Ancient Hebrew "herem", meaning 'devoted to God', 'forbidden for profane use'] is used