It is to the advantage of the R+5 forces to keep the jihadi/unicorns fighting to defend their present positions as long as possible. The jihadi/unicorns are not local forces in the places where they are fighting. There are only so many of them. "Dead men don't bite" should be the watchword of the campaign for the R+5.
Something was said about NW Syria not being good "tank country." IMO that is an over-simplification. If you think of armored forces as being cavalry to be used in broad sweeping movements in the style of Murat, Guderian or Patton then that would be true, but it is also appropriate to think of tanks the way the Wehrmacht thought of mobile assault guns used in direct support of infantry in the attack. The Wehrmacht was very good at this and developed specialized weapons such as the STUG-III for the mission. A T-72 tank combined with infantry makes a formidable weapon in close combat. The USMC thinks of tanks the same way, and plots each vehicle on their maps as major assets. pl