Even with its physical “caliphate” in Iraq and Syria in tatters, the Islamic State is still managing to wage a global insurgency, maintaining an operational presence in at least 20 separate countries. The organization’s global diffusion recently led a group of leading terrorism experts to describe ISIS as an “adhocracy,” …

For much of the Syrian civil war, the southern city of Deraa and the surrounding Houran Plains, an agricultural region near the Jordanian border, were divided between government forces and armed rebels. Fighting raged back and forth, killing thousands. It was not until Russia backed a government offensive in 2018 …

Around the world, states locked in conflict with jihadists are trying to devise policies to reintegrate disillusioned militants into society. In Nigeria, a program targeting defectors from the violent extremist group Boko Haram offers a window into the promise and pitfalls of such efforts. For the past 12 years, Nigeria …