Who is it?
What is the philosophical outlook of a general? Is there a fundamental similarity among them? Or are they different? Is the outlook of a general different from that of average people?
Is it true that we "can't handle the truth?"
I don't know the general answer to your question, but I am now reading a wonderful book called, The Ghosts of Cannae: Hannibal and the Darkest Hour of the Roman Republic
Robert L. O'Connell on my Kindle, and if anyone deserves to be called the greatest of all generals it was Hannibal. As the author says, Hannibal seemed to be able to see into the minds of the opposing Roman generals , and anticipate what they would do with unerring accuracy. His invasion of Italy over the Alps with a bunch of elephant was a stupendous achievement (we still do not know just what passage he took) and his ability to win battle after battle as he took on Rome on its home turf while gathering allies from the disaffected people (the Gauls and Celts) was a marvel of strategy combined with diplomacy. And the battle of Cannae (August 2, 216 BC) in the south of Italy where he took on the Roman army, and with an ingenious strategy which involved luring the Romans to attack in the center while he enveloped them from either wing, and crushed them, is still studied in war colleges now, and has been emulated (although with less success) many times since. I the battle of Cannae it is estimated that between fifty and sixty thousand Romans were killed in one day
which is a greater than any casualty toll in any one day's battle ever since then topping even the one day slaughters in World War I at Paschandale, and even topping the one day slaughters on the Russian front in World War II. Until he was defeated at the battle of Zama (October 19, 202 BC) just outside of Carthage (in what is now called Tunisia) by the great Roman general, Scipio Africanus, he made Rome's life a living hell. The book by O'Connell is vivid.
Hannibal won battle after battle. How else do you gauge the greatness of a general? The function of a general is to win battles, and when he performs that function he is a great general. Maybe not only
if he performs that function, but certainly not unless he performs that function.