Military anything is a sign of political and diplomatic failure.

Hence we gloss over how traditional military thinking, as taught at Sandhurst is as useless as it is increasingly irrelevant. It begins with admission of failure and has done ever since we were told Jesus wants us to exploit natives of far and distant lands.

That said, when you are called up as opposed to living the dream, your real life perspective can help. Hence so many Gung Ho officers in WW1 killed in action going over the top had bullet entries in their back.

Many WW2 memoirs mention that one reason that war was better planned and executed overall was that the top brass had been junior officers in the previous war and wished to ensure they didn't make the mistakes their leaders did. Mainly by ignoring what they were taught.

Apparently the historians said so. Can't you hear them? There you go, they just said it again.