During the Dust Bowl years, in the '30s, 2.5 million people moved west out of Oklahoma, Arkansas, Missouri, Texas and Kansas. Most settled in California's San Joaquin Valley, and they brought all their music there with them. When WWII brought all the war time jobs to places from Long Beach to Pasadena, millions made their way there for a better pay grade than picking fruit. When all those Western Swing bands were playing around the area during the early-mid '40s there were a dozen ballrooms that held thousands in just a 50 mile radius, and they were packed every night. Leo made a great living off amplifying that music.