ISIS likes headlines. ISIS doesn’t like a big fight. They attack when they can completely overwhelm by numbers and surprise. In Iraq, the ersatz national forces run and hide when ISIS arrives, but after months of planning they and the other Iranian proxy forces in the country counterattack and drive them out. Trouble is, they come back. It took months of fighting ISIS (and Turkey), but the Kurds ejected ISIS from the map flyspeck Kobane. ISIS fought hard, because losing was such bad PR. It’s never worked out to say that ISIS has peaked, so I won’t. But whatever new org arises from the latest ashes will doubtless make them look like a dramatization of a world war given by mimes.
I'd be willing to say a division or two of USMC could wipe those ISIS bastards off the map in short order. Wish they could, the world is tired of their lazy, pick-only-on-the-weakest terrorism. They're nothing but pussy bullies. Let's see them take on a true fighting force, they'd run away like the Iraqi Army in the Gulf War!