Though Islamic State fighters still hold out in a pocket of central Syria’s remote desert, and have gone underground as sleeper cells in Iraqi cities, able to launch new attacks, their territorial rule is, for now, almost over.
It ends a project launched from the great mediaeval mosque of Mosul in northern Iraq in 2014, when Abu Bakr al-Baghdadi seized advantage of regional chaos to proclaim himself caliph, suzerain over all Muslim people and land.
He set up a governing system with courts, a currency and flag that at its height stretched from northwest Syria almost to Baghdad, encompassing some two million inhabitants.