Found this today on the Internet, and being a music lover, fan of the 1939 movie, "Juarez," and author of a book on the French Intervention, I was moved by this history of the song well associated with the holiday.
link
If you follow the link, enjoy the read, but shame on you if you don't play the quote from the movie, and especially if you don't click on the link to "The English Translation" and hear the beautiful rendition by Greek singer Nana Mouskouri.
Afterwards, take a Mexican friend to lunch, and kick a Frenchman in the knee!
TVAG