For Keith. A slight change of venue to illustrate the media war. I find the viewpoint quite challenging.

https://www.aljazeera.com/indepth/opinion/media-mass-deception-180409092703608.html

And to follow, a map of Syria showing the dispositions of all combatants. Apart from the US forces. However we are told they are east of the Euphrates (ie the Syrian and Kurdish border)

Now for anyone with a mind to think, the map represents the de facto partitioning of Syria with embedded assets to ensure it's permanence.
The Turks also have a Kurdish problem. (Divide and conquer?) There have been a number of coalition airstrikes in the vicinity of this border on Syrian assets and also on Deir Az Zor when Syria booted the "rebels" out a few months ago
As the map is from Al Jazeera the explanatory notes need to be used with caution.
Now it must be obvious to anyone that the entire area is a mishmash of competing factions, most not very nice people.
Being very cynical, I would say Isis fights the Syrian Army all the time and America carries out sorties on supposed Isis(in reality the Syrian Army) on mondays and thursdays, and the rest of the week is training Isis and rearming them to continue the "good" fight. But slowly the mask is dropping. The end game is regime change. Meanwhile the state dept and pentagon play mix and match.