https://www.almasdarnews.com/article/exclusive-tiger-forces-deploy-east-hama-next-big-battle/
According to a senior military source, the Syrian Army does not want
to besiege ISIL by advancing further south towards Deir Ezzor; instead,
they want to forces the terrorist group to retreat from central Syria
to the aforementioned province.

シリア国内ではそろそろ逃げ場も少なくなっているわけだが…
一先ずはユーフラテス河の反対側へ追いやりたいのだろうか？