Through one of the internet’s many rabbit holes, I came across this video from 1943 of Judy Garland singing ‘Over the Rainbow’ on the ‘Command Performance‘ program. She is introduced here by Bob Hope.
‘Over the Rainbow’ as a theme seems a universe away from ‘Courtesy of the Red White and Blue‘ so I dug a little further. ‘Over the Rainbow’ debuted in The Wizard of Oz in 1939. It came to be thought of as a symbol of the United States by US troops (Barnet, Nemerov, and Taylor, The Story Behind the Song). Their book makes it seem like it was the go-to anthem during World War II, much like Toby Keith’s song became popular in the years following the September 11th attacks. I haven’t been able to track down any more information on it, though.
‘Over the Rainbow’ would later be named the #1 song in a film of all time by the American Film Institute.