So why did the Afghan military collapse? The answer is threefold.

First, former President Donald Trump’s February 2020 peace deal with the Taliban in Doha doomed us. It put an expiration date on American interest in the region. Second, we lost contractor logistics and maintenance support critical to our combat operations. Third, the corruption endemic in Mr. Ghani’s government that flowed to senior military leadership and long crippled our forces on the ground irreparably hobbled us.

The Trump-Taliban agreement shaped the circumstances for the current situation by essentially curtailing offensive combat operations for U.S. and allied troops. The U.S. air-support rules of engagement for Afghan security forces effectively changed overnight, and the Taliban were emboldened. They could sense victory and knew it was just a matter of waiting out the Americans. Before that deal, the Taliban had not won any significant battles against the Afghan Army. After the agreement? We were losing dozens of soldiers a day.