Boko Haram is a Nigerian terrorist organization that ranks among one of the most destructive terrorist organizations of all time. The insurgents pose a great threat to Africa's most populous country and its neighbors. This group performs acts of religious terrorism, but also by certain acts it belongs to the guerrilla group. It has organized combat tactics, which, however, began to change over time in 2015. Boko Haram, like the Islamic State in Syria and Iraq, is trying to create a caliphate in northern Nigeria that will be governed primarily by Sharia law.