Both the Trump and Obama administrations relied heavily on highly trained Special Forces units to keep Afghanistan from collapse. The strategy has kept recent episodes of the 21-year Afghan War out of the public eye, but it is failing to stabilize the country and is straining the United States military's elite troops, who serve back-to-back combat tours without an end in sight and disproportionately give their lives in service of a war the public knows almost nothing about.

When Kunduz, a major city in northern Afghanistan, fell to the Taliban in 2015, U.S. Special Forces were dispatched on a secret mission to help Afghan commandos recapture it. Under-resourced and unprepared, the soldiers found themselves in the midst of a pitched battle with conflicting orders. The story of how it led to one of the U.S. military's worst disasters in Afghanistan shows the perils of relying on Special Operations alone to fight the nation's wars.