The Washington Post reports that “after months of un­expectedly swift advances, the U.S.-led war against the Islamic State is running into hurdles on and off the battlefield that call into question whether the pace of recent gains can be sustained.”  

“Chaos in Baghdad, the fraying of the cease-fire in Syria and political turmoil in Turkey are among some of the potential obstacles that have emerged in recent weeks to complicate the prospects for progress. Others include small setbacks for U.S.-allied forces on front lines in northern Iraq and Syria, which have come as a reminder that a strategy heavily reliant on local armed groups of varying proficiency who are often at odds with one another won’t always work.”  

“When President Obama first ordered U.S. warplanes into ­action against the extremists sweeping through Iraq and Syria in 2014, U.S. officials put a three- to five-year timeline on a battle they predicted would be hard. After a rocky start, officials say they are gratified by the progress made, especially over the past six months.”