The first sentence of a memorial poem by American World War II veterans to the fallen soldiers is "We are old, but they are still young".

This is the chorus of Old Soldiers Never Die sung by a British soldier during World War I, which MacArthur quoted in his speech. The original song is said to imitate another ditty, which should be a more relaxed and humorous song.

The barracks room song was a parody of the hymn “Kind Words Never Die.” And, unlike the ending of MacArthur’s farewell address, The lyrics of this old army song are more humorous than schmaltzy.

It seems that most of the online searches are American red songs reinterpreted according to the spirit of MacArthur's speech.

OLD SOLDIERS NEVER DIE, NEVER DIE, NEVER DIE

OLD SOLDIERS NEVER DIE, THEY JUST FADE AWAY