Analysis: Qurayshi’s killing by the US has to be set against January’s raid on a Syria prison, IS’s biggest attack for years

Being an Islamic State leader is not what it used to be. The death of the latest IS supremo, Abu Ibrahim al-Hashimi al-Qurayshi, far from the heartland of the terror group’s rise in Iraq in a frugal home in the back blocks of Syria, is another painful blow to an organisation that only five years ago held significant territory in both countries and cast a shadow across an entire region.

Its slide ever since has been dramatic. Unable to hold land, its old guard wiped out, its finances shredded and rank and file depleted, IS looks – at face value – like a group that has had its day. And yet it still lurks amid the rubble of both countries, where it is slowly yet assuredly stirring.

Those who fought the so-called caliphate fear a US withdrawal could help the terrorist group to rise again

On a blazing afternoon in Syria’s eastern desert this month, a Kurdish commander was hot under the collar. An American raid had just taken place against remnants of Islamic State (IS), and Lukman Khalil, the region’s most senior military leader, had known nothing about it.

The US forces had flown across the wasteland of the terrorist group’s last redoubt. Three years ago it was teeming with diehard IS members, but when thousands of holdouts emerged from the decimated town of Baghuz, the war against the so-called caliphate was won, or so it seemed.