Follow the Band is a 1943 black-and-white musical film directed by Jean Yarbrough, one of many Universal churned out during World War II.
It stars Eddie Quillan, Mary Beth Hughes, and Leon Errol, and is noteworthy as an early credit for Robert Mitchum.
Another man who works at the farm, Tate Winters, is also romantically interested in Juanita, and when he finds out about the engagement he convinces Pop that Marvin should be sent away on business.
During the show at night, Marvin accidentally becomes a local hero when he pops out gang leader Alphonse as he is trying to destroy the nightclub after being fired by Big Mike.
But Marvin is heart broken too, and instead of jumping at the opportunity he quits the band entirely and goes home to Rutledge to win Juanita back.