Example, Afghanistan before 9/11. The Taliban was beating the Northern Alliance at every turn. Their territory was squeezed down to a small patch on the northern border. Immediately after 9/11 the Northern Alliance received American air support. It was decisive. The Alliance won every battle now that a radio call would bring a smart bomb down on any obstacle. The Taliban was driven out of the country.
This could work against ISIS. The Kurds are tough fighters, willing to sign up with America. Give them the kind of air support we gave the Northern Alliance and great things might be accomplished.