Islamic State of Iraq and Syria (ISIS)/Al-Qaida in Iraq
ISIS stands as one of the most successful terrorist groups to date. Militarily, it at one point established two capitals for its self-proclaimed caliphate and controlled expansive territories in Iraq and Syria under functional government structures. Ideologically, it continues to inspire lone wolf attacks and new branches around the world. The group is known for its brutality, including its release of a number of videotaped beheadings, indiscriminate suicide and mass casualty bombings,...