What's been long predicted on this page might finally be coming to pass:
The Islamic State appears to be starting to fray from within, as dissent, defections and setbacks on the battlefield sap the group’s strength and erode its aura of invincibility among those living under its despotic rule.
Reports of rising tensions between foreign and local fighters, aggressive and increasingly unsuccessful attempts to recruit local citizens for the front lines, and a growing incidence of guerrilla attacks against Islamic State targets suggest the militants are struggling to sustain their carefully cultivated image as a fearsome fighting force drawing Muslims together under the umbrella of a utopian Islamic state.
That Liz Sly writing for WaPo. She goes on to report:
Meanwhile, territorial losses in northern Syria and elsewhere in Iraq are contributing to the sense that the group that stunned the world with its triumphant sweep through Iraq and Syria last summer is now not only on the defensive but also struggling to find a coherent strategy to confront the multiple forces ranged against it.
Of course, a US Army Brigade Combat Team or two, prepositioned in Iraq under a proper Status of Forces Agreement, would have made quick work of ISIS a year ago.