I recall reading in Flags of Our Fathers that the marines who took Iwo Jima actually trained for more than a year for that specific mission. They went so far as to find a chunk of one of the Hawaiian islands that even had a volcanic hilltop similar enough to Suribachi and practiced storming it.
And ISTR that the Normandy troops underwent similar training for their landings. have troops since then ever trained for such specific missions (i.e., not “amphibious landing” or “urban warfare”, but “landing at Iwo Jima” or “fighting in the western streets of Falluja”)? Or do the commanders just hope their boys are good enough and just wing it?