> > That leaves us with three options in cases like 9/11:
> There are no other cases like 9/11, except maybe Pearl Harbor.
> The third option worked pretty well there.
That was total war, with existential threats all around. 9/11 did not lead to total war.
> Vietnam was actually an example of the second option failing. While there was some effort at nation-building, it was as a means to defeating the “bad guys” (the so-called “hearts and minds” campaign), not rebuilding after taking care of the “bad guys”.
A distinction without much difference. Also true of Iraq (we engaged in nation-building both, for its own sake and to help pacify the place). We didn't stay very long after pacifying Iraq, and some would argue we never did pacify it.
> > Intervention in the Balkans did work in the 90s, but we didn't occupy
> The US was deeply involved in post-conflict peacekeeping and nation-building in the Balkans. In fact, it was still involved in that well into the time of the Afghanistan and Iraq wars.
Yeah, but there once the Serbians lost, and once a deal was reached with Russia, there was no source of further conflict, and this all happened fairly early on after U.S. intervention began, so the American public's patience was never tried, and we did not occupy either. That's not the case in Afghanistan.
If anything the Balkans experience shows when we can nation-build: when the conflict ends decisively. (We didn't end the conflict. The Croats and Bosnians did, with our help, yes, but they did the heavy fighting.)