“The Afghan forces are better than we thought they were,” Marine Gen. John Allen told Congress in 2012. “The Afghan national security forces are winning,” Army Lt. Gen. Joseph Anderson told reporters in 2014.

But in a trove of confidential government interviews obtained by The Washington Post, U.S., NATO and Afghan officials described their efforts to create an Afghan proxy force as a long-running calamity. With most speaking on the assumption that their remarks would remain private, they depicted the Afghan security forces as incompetent, unmotivated, poorly trained, corrupt and riddled with deserters and infiltrators.