Lol, see all the maps about the advances of the Syrian army against ISIS. This is the main front for the Syrian army during the last time. In the North, they have fought in the Raqqa governorate, and recently taken Resafa from ISIS (Daesh), and are now liberating the Itriya-Raqqa road from ISIS, in the South, they have advances toward the T2 airbase against ISIS, East of Palmyra they have advanced too in the Arak gas fields against ISIS, and in Deir Ezzor they defend the town all the time against continuing attacks from ISIS. And in East Hama the Syrian army is also fighting ISIS near Aqerbat. So, these are 5 different fronts where the Syrian army and its allies fight against ISIS. Ok, the Kurds fight too, in Raqqa, if they do not attack the Syrian army. Fine. But this is one front.
How is, instead, the US army base near Al Tanf fighting ISIS? Look at the maps in
#98, at the US base in the South, in the green area, and tell me how they fight ISIS. US bases which have no possibility to fight ISIS, and, therefore, do not fight ISIS, have no legitimacy at all, and clearly violate international law.
The other fields where the Syrian army attacks, in particular in Daraa, the fighting seems to have stopped, because of a ceasefire reached by the Russians. So, actually there is only one region where the Syrian army does not fight ISIS, but instead Al Qaida - the suburb Jobar of Damaskus. Here an actual map:
A quite small local fight, with the Syrian army advances measured in the number of buildings taken.