U.S. and Iraqi commanders here in western Iraq warn that victories over IS could be undercut easily by a large-scale withdrawal. Iraq’s regular military remains dependent on U.S. support. Many within Iraq’s minority communities view the U.S. presence as a buffer against the Shiite-dominated central government. Still, Iranian-backed militias with strong voices in Baghdad are pushing for a complete U.S. withdrawal, and some Iraqis liken any American presence to a form of occupation.

That has left an uncomfortable limbo in this area that was the last battlefield against the extremists. Coalition commanders still work with Iraqi forces to develop long-term plans for stability even as a drawdown goes ahead with no one certain of its eventual extent.