Context.
He was up against a literary culture with a lot of bogus stuff in it like "if the wind is in the east the army camped on the plain will be victorious, but if the goose is sacrificed and its liver has a spot do not pass Go".
The bit where he says "make decisions based on information from people with military knowledge" is golden, a great moment in military theory: likewise when he does the cost/risk analysis of paying bribes to spies. Its obvious to us but he's the giant who first expressed this rational maxim.
It's the moment war stops being a noble pastime and becomes a profession. You're very right it is simple, its very stripped back because it has no ********.
I'm awaiting the third Cornish book, lovely little series that with the Lamplighters. In the meantime I'm reading everything I can find on Phillip 2 of Macedon.
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