Although both the US and Iran are currently denying direct co-operation with each other, it's an intriguing thought to wonder who is talking to who behind the scenes in the latest coalition. Liaison officers??
On a separate note, I understand that IS/ISIS/ISIL has now been formally rebranded (at least in military circles) as Da'eash (pronounced Daish). It is allegedely a derogatory Arabic term for 'poncey terrorist scumbags' or words to that effect....