Trivia-
For guitar enthusiasts- Fernando Sor wrote a series of variations- "Variations sur Marlbrough s'en va-t-en guerre," Opus 28.

The tune occurs on the cd, Fiddle Tunes of the Lewis and Clark Era, Voyager Recordings. Any proof that it was fiddled at that time?

The tune of Marlborough is widespread, but what proof is there that it was brought back to Europe by Crusaders? More likely the tune was brought to the Peninsula by the Moors.

A fragment is in the folk literature of the Sephardic Jews:
Las nuevas que vos traigo
os van a hather yorar
Mambrý queda muerto
en la raya de Portugal---(gap)
Quatro cures y un fraile [monk]
lo yevan a enterrar.
[raya- within (the boundaries of); fraile- monk]
http://www.sephardifolklit.org/flsj/xml-di/Zam14b-3Dl.html