Terrorist Groups

Islamic State in Iraq and Syria

Authors: Zachary Laub and Jonathan Masters

Islamic State in Iraq and Syria (ISIS) has capitalized on Iraq's Sunni minority's alienation from the state, driven by sectarian politics and heavy-handed approaches to security, to wreak havoc and establish zones of authority while expanding its reach into neighboring Syria.

See more in Terrorism; Iraq

Hamas

Author: Zachary Laub

Hamas is the main Palestinian armed resistance group, but the Islamist movement has struggled with governance since assuming control of Gaza.

See more in Israel; Palestine; Terrorism

Boko Haram

Authors: Mohammed Aly Sergie and Toni Johnson

Nigeria's Islamist group Boko Haram has evolved from a local insurgency to a brutal militant group that the United States has designated a terrorist organization.

See more in Nigeria; Radicalization and Extremism