Islamic State fighter (ISIS; ISIL) waving a flag while standing on captured government fighter jet in Raqqa, Syria, 2015. Getty Images Territorial losses and military defeats have rocked the ...

You cannot understand ISIS without understanding al-Qaeda and the history they share, as well as the differences, there at the beginning, that would ultimately divide them.

So ISIS had been here, had done their damage, had burned their books, and this kind of destruction of the building that we're looking at would have happened right at the end. Liberation brings a ...

Graeme Wood’s recent Atlantic essay on “What ISIS Really Wants” is an exceptionally thoughtful assessment of Islamic State as a group bent on “medieval” violence. It should be required ...

ISI/ISIS: First Iraq, then Syria By 2011, when the U.S. troop withdrawal was complete, AQI was being run by Abu Bakr al-Baghdadi, and had morphed from a largely foreign to a largely Iraqi operation.

David M. Perry: Calling ISIS "medieval" is a serious mistake. The claim that there's an inexorable conflict between Islam and "The West" is not based on history, but rhetoric used by extremists to ...

Watch FRONTLINE's documentary on the creation of ISIS, Abu Musab al-Zarqawi, Abu Bakr al Baghdadi, and U.S. failures to stop the group's brutal rise.

ISIS’ cleansing of rich, plural history is meant to trap those under its sway with enforced ignorance. World’s response must be education to keep history alive.

Fighting ISIS: Former CIA deputy director on call to send U.S. troops to Iraq, Syria 02:58. But instead of compliance, Iraq's second largest city has - at least so far - responded to the Sunni ...

ISIS' release of yet another videotape showing the beheading of a western hostage has once again drawn international condemnation and refocused attention on the very practice. In fact, beheadings ...