This 2007 clip from Lions for Lambs comes to mind…

Meryl Streep: How about a strategy to bring the troops home?

Tom Cruise: So leave?

Meryl Streep: Not an option.

Tom Cruise: Okay, uh… let's play this out. We walk, and Afghanistan reverts back to the Taliban. Only now the Taliban has metastasized into something infinitely more vicious and potent because they're now 2-0 versus superpowers. They butcher the people who helped us, who voted and were stupid enough to put their faith in our word. So call it not only the end of hope for 10s of millions of Afghans, but the end of American credibility, the end of America as a force for righteousness in the world. And when we're forced to go back in a couple years, and please quote me on this, we'll be squared off against a shattered Iraq, a hopeless Afghanistan, and a nuclear Iran. How many troops are we going to need then? I guarantee you'll be adding some zeros.