"Does the Army Need a Full-Spectrum Force or Specialized Units?"

I assume I am not alone in considering the nature of the question as part of the problem. There maybe no stupid questions but this one indicates a real lack of understanding.

The Manoeuvre Warfare crowd always tout the old focus on "the enemy and not terrain" and yet that has clearly produced a very limited mindset, where enemy and terrain are seen as defining the problems and not opportunities.

One well trained and rationally equipped army can do anything you want it to. What someone needs to ask is why some armies fail to be able to do it.