History -- 4 Terrorism -- 20th century 1 Foreign relations -- 1 Guerrilla warfare -- 1 Insurgency -- 1 International relations 1 more ... Islamic fundamentalism -- 1 Low-intensity conflicts (Military science) 1 Military history, Modern -- 1 National security -- 1 Political aspects 1 Terrorism 1 Violence -- 1 World politics -- 1 less ...