Jason Isbell and the 400 Unit in Nashville

Jason Isbell and the 400 Unit is the Alabama singer-songwriter Jason Isbell's band, named after a psychiatric ward in Florence, Alabama, and drawn largely from Muscle Shoals musicians. Their music spans country, Americana, folk and Southern rock. Albums include "Here We Rest" (2011) and "Reunions" (2020), and "The Nashville Sound" (2017) and "Weathervanes" (2023) both won the Grammy for Best Americana Album.