Jacob Siegel writes: For a few months, the marauding jihadis of ISIS might have looked like an unstoppable army. That’s when they were moving at high speeds, their power blurred by hype and velocity. Slowed down by real resistance, a clearer picture takes shape and the limits of ISIS’s military power come into focus.

At the so-called caliphate’s edges, in areas like the Syrian border town of Kobani, ISIS’s march has stalled and its armor is starting to crack. We may be reaching the limits of ISIS as a conventional military force.

Facing a small Kurdish resistance and Western airpower, ISIS has been unable to take Kobani, despite surrounding and besieging it for months. That doesn’t mean the group is giving up, though, or anywhere close to defeat. The façade of ISIS’s power as a conquering army may be wearing off, but they can still revert to terrorist form and continue killing even if they can’t take ground.

Early on, ISIS leaders committed to a risky gambit: They decided to form a state, which put them in open conflict with other world powers. The group could have survived as a terrorist organization or a local insurgency as it had for years, but instead wagered on the caliphate. That decision provided an aura of authority that attracted new recruits and seemed to pay off in the short term. But it also transformed a regional threat into a global enemy that was easier to target in the areas it controlled. [Continue reading…]