I might well do a "British Army lessons learned" thing, actually - this one much more a matter of "British perceptions" than necessarily reality, though given they currently have (arguably, arguably) the best army in the world at pitched battles, it's probably going to be fairly accurate for the here and now anyway.
Come to think of it, the Duke of Cambridge might prove an effective mouthpiece. Despite the caricature, he was quite the reformer in his youth (which this is!) and seems to essentially have been R Lee Emery as a field officer and duke. Via Robcraufurd:
“...the Duke had inherited from his uncles, of the Regency generation, a command of varied and picturesque imagery far beyond the resources of Billingsgate.”
He once ended a cadet mutiny at Sandhurst with little more than bad language, and when Kaiser Wilhelm I made various suggestions of eligible German princesses (ignoring the Duke’s existing morganatic marriage) he was greeted with a "wealth of invective [that] nearly paralysed the Emperor. In bluntest terms he [the Duke] described Germans in general, Prussians in particular, and Teutonic princesses in detail. No gentleman, he stormed, would ever advise another to desert a lady to whom he had pledged his word in the sight of God and man."
He once concluded a review with the words “In all my experience of reviews in England, Ireland or on the Continent of Europe, I have never witnessed such a damnable exhibition of incompetence as has been shown by the Grenadier Guards today. When the Cease Fire sounded, the First Battalion was firing at the Serpentine; the Second Battalion was firing at the Marble Arch; and God Almighty knows where the Third Battalion was firing. I don’t.”
At another inspection, he had the following discussion with the colonel of a battalion:
“Where are the pioneers? I don’t see them.”
“In front of the leading company, your Royal Highness.”
“Have they got their picks and shovels with them?”
“Certainly, your Royal Highness. Do you want them to do anything?”
“Yes. I want them to dig a very deep and very wide hole, and then bury this battalion in it.”