How is the title of "Dust Bowl Dance" relevant to the song?
I was introduced to the song "Dust Bowl Dance" by Mumford and Sons through this video, about the character Percy from Campaign 1 of the D&D show Critical Role (spoilers in video). The song fits so well it seems almost written about him.
Upon listening to the song, though, I'm not sure what the title "Dust Bowl Dance" has to do with the song. The song appears to be about revenge; what does the title have to do with that?
How is the title relevant to the song?