“Veni, Vidi, Vici,” boasted Julius Caesar, one of history’s great military captains. “I came, I saw, I conquered.”

Then-Secretary of State Hillary Clinton echoed that famed saying when summing up the Obama administration’s military intervention in Libya in 2011 — with a small alteration. “We came, we saw, he died,” she said with a laugh about the killing of Muammar Gaddafi, that country’s autocratic leader. Note what she left out, though: the “vici” or victory part. And how right she was to do so, since Washington’s invasions, occupations, and interventions in Afghanistan, Iraq, Libya, and elsewhere in this century have never produced anything faintly like a single decisive and lasting victory.

“Failure is not an option” was the stirring 1995 movie catchphrase for the dramatic 1970 rescue of the Apollo 13 moon mission and crew, but were such a movie to be made about America’s wars and their less-than-vici-esque results today, the phrase would have to be corrected in Clintonian fashion to read “We came, we saw, we failed.”

Wars are risky, destructive, unpredictable endeavors, so it would hardly be surprising if America’s military and civilian leaders failed occasionally in their endless martial endeavors, despite the overwhelming superiority in firepower of “the world’s greatest military.” Here’s the question, though: Why have all the American wars of this century gone down in flames and what in the world have those leaders learned from such repetitive failures?

The evidence before our eyes suggests that, when it comes to our senior military leaders at least, the answer would be: nothing at all.

Let’s begin with General David Petraeus, he of “the surge” fame in the Iraq War. Of course, he would briefly fall from grace in 2012, while director of the CIA, thanks to an affair with his biographer with whom he inappropriately shared highly classified information. When riding high in Iraq in 2007, however, “King David” (as he was then dubbed) was widely considered an example of America’s best and brightest. He was a soldier-scholar with a doctorate from Princeton, an “insurgent” general with the perfect way — a revival of Vietnam-era counterinsurgency techniques — to stabilize invaded and occupied Iraq. He was the man to snatch victory from the jaws of looming defeat. (Talk about a fable not worthy of Aesop!)

Though retired from the military since 2011, Petraeus somehow remains a bellwether for conventional thinking about America’s wars at the Pentagon, as well as inside the Washington Beltway. And despite the quagmire in Afghanistan (that he had a significant hand in deepening), despite the widespread destruction in Iraq (for which he would hold some responsibility), despite the failed-state chaos in Libya, he continues to relentlessly plug the idea of pursuing a “sustainable” forever war against global terrorism; in other words, yet more of the same.

Here’s how he typically put it in a recent interview:

“I would contend that the fight against Islamist extremists is not one that we’re going to see the end of in our lifetimes probably. I think this is a generational struggle, which requires you to have a sustained commitment. But of course you can only sustain it if it’s sustainable in terms of the expenditure of blood and treasure.”

His comment brings to mind a World War II quip about General George S. Patton, also known as “old blood and guts.” Some of his troops responded to that nickname this way: yes, his guts, but our blood. When men like Petraeus measure the supposed sustainability of their wars in terms of blood and treasure, the first question should be: Whose blood, whose treasure?

When it comes to Washington’s Afghan War, now in its 18th year and looking ever more like a demoralizing defeat, Petraeus admits that U.S. forces “never had an exit strategy.” What they did have, he claims, “was a strategy to allow us to continue to achieve our objectives… with the reduced expenditure in blood and treasure.”

Think of this formulation as an upside-down version of the notorious “body count” of the Vietnam War. Instead of attempting to maximize enemy dead, as General William Westmoreland sought to do from 1965 to 1968, Petraeus is suggesting that the U.S. seek to keep the American body count to a minimum (translating into minimal attention back home), while minimizing the “treasure” spent. By keeping American bucks and body bags down (Afghans be damned), the war, he insists, can be sustained not just for a few more years but generationally. (He cites 70-year troop commitments to NATO and South Korea as reasonable models.)

Talk about lacking an exit strategy! And he also speaks of a persistent “industrial-strength” Afghan insurgency without noting that U.S. military actions, including drone strikes and an increasing reliance on air power, result in ever more dead civilians, which only feed that same insurgency. For him, Afghanistan is little more than a “platform” for regional counterterror operations and so anything must be done to prevent the greatest horror of all: withdrawing American troops too quickly.

In fact, he suggests that American-trained and supplied Iraqi forces collapsed in 2014, when attacked by relatively small groups of ISIS militants, exactly because U.S. troops had been withdrawn too quickly. The same, he has no doubt, will happen if President Trump repeats this “mistake” in Afghanistan. (Poor showings by U.S.-trained forces are never, of course, evidence of a bankrupt approach in Washington, but of the need to “stay the course.”)

Petraeus’s critique is, in fact, a subtle version of the stab-in-the-back myth. Its underlying premise: that the U.S. military is always on the generational cusp of success, whether in Vietnam in 1971, Iraq in 2011, or Afghanistan in 2019, if only the rug weren’t pulled out from under the U.S. military by irresolute commanders-in-chief.

Of course, this is all nonsense. Commanded by none other than General David Petraeus, the Afghan surge of 2009-2010 proved a dismal failure as, in the end, had his Iraq surge of 2007. U.S. efforts to train reliable indigenous forces (no matter where in the embattled Greater Middle East and Africa) have also consistently failed. Yet Petraeus’s answer is always more of the same: more U.S. troops and advisers, training, bombing, and killing, all to be repeated at “sustainable” levels for generations to come.

The alternative, he suggests, is too awful to contemplate: