Rather than fighting Nation State wars solely we can expect more combat to be asymetrical and require combat in urban areas. This is nothing new, it used to be an acronym MOUT Military Operations Urban Terrain during the cold war and in WWII was just a pain in the tucas. If you're prepared for it and equiped for it it can clean your clock. Stalingrad, Berlin are both good example of how the SNAFU the MOUT battle and get your clock cleaned and how to do it right.
Was there a sudden prepared need?