MILITARY STRATEGYA Return to U.S. Casualty Aversion

By John Mueller

Published 13 April 2024

The 9/11 Wars as aberrations: After the extended, tragically costly, and fundamentally absurd aberrations caused by the overreaction to 9/11, a more limited American military approach appears to be back—and perhaps is even more embraced than in the post‐Vietnam decades.

Impelled by an overwhelming desire to hunt down those who were responsible for the September 11, 2001, terrorist attacks, the United States launched military invasions of Afghanistan and Iraq, where it toppled regimes that had little or nothing to do with 9/11. There has been a tendency to see these exercises as misguided elements of a coherent plan to establish a liberal world order or to apply liberal hegemony. However, the warring of the post–9/11 period has been a glaring, extended, and highly consequential aberration. During the quarter century before that, the United States pursued a foreign policy that was far more casualty averse.

Over the past decade, the country has moved back to—and appears poised to expand on—that tradition after its exhausting 9/11–induced military ventures that ran such high costs for so few benefits. Moreover, public opinion in the United States is not messianic or in constant search of hegemony or of monsters abroad to destroy.

As part of its move back to a more limited military approach, the United States developed—or further developed—a strategy called “by, with, and through” that was particularly evident in its successful military campaign from 2014 to 2019 against the Islamic State. In this, the United States worked with local forces by providing advice, supplies, and intelligence, and by carrying out air strikes while the locals were expected to take almost all of the casualties. Although this approach is hardly new, it seems to have a future and is currently being applied in the war in Ukraine. It might also be applied to deal with a Chinese invasion of Taiwan.

Introduction
Impelled by an overwhelming desire to hunt down those who were responsible for the September 11, 2001, terrorist attacks, the United States launched military invasions of Afghanistan and Iraq, where it toppled regimes that had little or nothing to do with 9/11. That task was initially successful but those conflicts soon devolved into extended counterinsurgency (or counteroccupation) wars that resulted in the deaths of more than 100 times as many people as perished on 9/11.