The 400 Unit debuted in 2009 as the backing band of Americana artist Jason
Isbell, an Alabama native who previously performed with the Drive-by Truckers.
After making his solo debut with 2007's Sirens of the Ditch, Isbell introduced
his new band with a self-titled release, Jason Isbell and The 400 Unit, in
February 2009. The record peaked at number 131 on the Billboard 200, received a
nomination at the Americana Music Awards, and foreshadowed the success that
would follow during the 2010s. After 2011's Here We Rest, Isbell released two
records under his own name, including the Gr...