This is the current US strategy in partnership with the Iraqi Government - better than "degrade and ultimately defeat".

Things are much clearer in Iraq than the Syria.

Here's more geo detail of Syria and Iraq.

Here are our bases

and here is the contribution by country

Finally the US has the lead in this mission, like it or lump it, so the competence and commitment of the US administration is critical for us.   This is US Secretary of Defense Ash Carter at Davos last week.

It's a shame to see the persistence in calling the Islamic State un-Islamic.

Click here for transcript

http://www.defense.gov/News/News-Transcripts/Transcript-View/Article/644230/remarks-by-secretary-carter-at-the-world-economic-forum-in-davos-switzerland