In the 1930s, big bands and swing music were popular, with Duke Ellington, Benny Goodman, and Glenn Miller popular bandleaders. In the 1940s, the bands started to break up, and band singers like Frank Sinatra and Sarah Vaughan went out on their own. War songs became popular.
When the person you want to give them the Brainliest rank, wait a few moments, and then above their answer it will give you the option saying 'Give Brainliest'.