Chairman of the Joint Chiefs of Staff Gen. Mark Milley said "we absolutely missed" the quick collapse of the Afghan military and government.
"We absolutely missed the rapid 11-day collapse of the Afghan military and the collapse of their government. I think there was a lot of intelligence that clearly indicated that after we withdrew, that it was a likely outcome of a collapse of the military, a collapse of the government," Milley said in response to a question from Sen. Jeanne Shaheen, a Democrat from New Hampshire, at a Senate hearing on the Afghanistan withdrawal.
"Most of those intelligence assessments indicated that would occur late fall, perhaps early winter, Kabul might hold till next spring," Milley continued.
"While we were there, though, up through 31 August, there's no intel assessment that says the government is going to collapse and the military is going to collapse in 11 days that I'm aware of," he added.
Milley said US military didn't have the "full, wholesome assessment of leadership, morale, and will" among Afghan forces.
"Many units did fight at the very end. But the vast majority put their weapons down and melted away in a very, very short period of time. I think that has do with will, leadership, and I think we still need to try to figure out exactly why that was. And I have some suggestions, but I'm not settled on them yet. But we clearly missed that," he said.
"... We pulled our advisers off three years ago. When you pull advisers out of units, you can no longer assess things like leadership and will. ... You can't measure the human heart with a machine; you've got to be there," he said.