There will be no need for US troops. We should let the Russkies sort this mess out. They are far better at dealing with these kinds of problems. They do not require commanders to get lawyers to approve every action they take, and CNN does not get to go along to record every interaction and make an international incident out of it.
The real crux of the problem here is that obama's foreign policy is so messed up that we don't know which side to back. We have Assad, whom Obama has repeatedly targeted and who is aligned with Russia and Iran. So supporting him is awkward at best. Plus, the big check writers in Saudi Arabia and Qatar want him out. But the alternative is ISIS, the group secretly financed by our supposed allies, the "friendly" muslims in Saudi Arabia, Qatar and the Gulf states. ISIS have done us the huge favor of demonstrating that "peaceful" islam is a big lie, but we certainly can't support a group that uses religious justification for murder, kidnapping, rape and slavery.