Hat tip to WoTR for this article https://warontherocks.com/2018/01/ol...rkeys-war-pkk/ which dissects what happened when the PKK opted to fight in Turkish cities (it will be cross-posted elsewhere).

The authors have observations on the wider impact on urban operations, for strategy and operations. Near the end:
This dynamic suggests armed groups might choose to target cities even when their chances of military success are slim, that is, if they believe that they can frame the urban battle in ways that will help them achieve their long-term strategic objectives.