Jason Isbell’s sophomore album was released two years after his debut, in 2009, and marked a break from his Drive-By Truckers past. Rather than utilizing backing musicians and producers from his former band, he formed his own quartet.
Named the 400 Unit after the psychiatric unit of a hospital in Florence, Alabama, the band would be credited on most of Isbell’s future recordings. And they would help shift his music away from his Southern rock roots to a more folk rock/Americana sound. He named the album after the new band, Jason Isbell and the 400 Unit.

