ISIS Has Lost 25 Percent of Territory It Once Held in Iraq, US Says

Despite assessment, long fight still expected against the militant group.

“We assess ISIL’s front lines have been pushed back in northern and central Iraq,” Pentagon spokesman Col. Steve Warren said at a Pentagon briefing today, referring to the militant group also known as ISIS. “ISIL no longer has complete freedom of movement in roughly 25 percent of populated areas of Iraqi territory where they once operated freely.”

The recaptured areas represent an area between 4,100 and 5,200 square miles or 11,000 and 13,500 square kilometers, Warren said. At its peak, ISIS was in control of 55,000 square kilometers in northern and western Iraq, Pentagon officials said.

“ISIL lost large areas where it was once dominant in the governance of Babil, Diyala, Nineveh, Salahadin and Kirkuk,” Warren said.

Warren said the term "freedom of movement" equates to losing territory “if they don’t have freedom of movement they don’t control it.” I

The assessment that 25 percent has been recaptured is a significant increase from previous assessments released in January that Iraqi and Kurdish security forces had retaken 700 square kilometers.

“Their caliphate is in the process of shrinking,” Warren told reporters, noting that areas represented in the assessment were of populated areas that had been taken from ISIS control.

But he cautioned that the assessment was “not an exact science,” pointing to what he described as the “fluid battleground” inside Iraq.

“They’re not invincible, they can be stopped and that’s been proven,” Brennan said during an appearance today at the Council on Foreign Relations in New York. But Brennan also urged patience in the fight against ISIS, noting “this is going to take time. It’s going to be a long tough fight."

The CIA director said his agency was not working with the Iranians inside Iraq, though both countries have an interest in defeating ISIS.