On Monday Defense Secretary Jim Mattis told reporters at the Pentagon that the US is preparing for a long term military commitment in Syria to fight ISIS "as long as they want to fight."

Mattis indicated that even should ISIS loose all of its territory there would still be a dangerous insurgency that could morph into an "ISIS 2.0" which he said the US would seek to prevent. "The enemy hasn't declared that they're done with the area yet, so we'll keep fighting as long as they want to fight," Mattis said. "We're not just going to walk away right now before the Geneva process has traction."