'Garryowen' is also the tune the Light Brigade used when they charged into 'the valley of death' at Balaclava.

I think Dale Evans wrote the 'Aha San Anton'' song in 'Rio Grande'. That movie BTW was made in order to get the financing for 'The Quiet Man'. Republic didn't want to put up the money for TQM because the were not sure how much mass appeal the story would have. They agreed to finance it, if Ford would also make another western for them.