Call it Jihad 3.0. The militant group took Iraq and Syria by storm as a fully formed army in 2014. Now they’re getting pummeled on the battlefield and have to respond as insurgents. Some contend the next phase for ISIS will be online: A virtual caliphate encouraging attacks around the world. Though its physical losses are having an online impact — the group’s propaganda output has declined, along with its recruiting power — many are worried that the estimated 1,900 ISIS fighters back in Europe will stay connected.