High-Intensity Urban Combat Tactics – Special Tactics

I don't recognize the site and haven't read the article, but perhaps the biggest example of combat in a high-intensity conflict in a urban area is the battle of Stalingrad in the Second World War. I see that this post is tagged with Special Forces - but I think that for high-intensity conflict, this is probably more the domain of big, conventional maneuver units - Infantry battalion task forces - probably several of them in a battle (at least).

Some things that stand out from reading history about "big wars" in urban environments:
- rubbling buildings for preparation of a defense (intentionally collapsing buildings under your control into the streets to create complicated, nasty obstacles)
- subterranean movement (tunnel and sewer movement between buildings - a lot of MOUT sites have this represented in their construction)
- enormous use of hand grenades and satchel charges
- contested control of buildings (I've read accounts of Soviet and German lines passing through buildings for days at a time, in which each side controlled different parts of the same building)
- very high density of troops (much more than in other terrain), and therefore a need for lots of Soldiers

Alternate and more recent examples could include Hue and Fallujah, but Stalingrad was a very big conventional battle. FM 90-10-1 is dated, but talks at length about combat in urban terrain in a "big war" conflict.