Aaah, a couple of favourites here! The beleaguered garrison in "Zulu" responding to the Zulu chant is a really brilliant way both of including something distinctive of each group (even if "Men of Harlech" is in translation) and of racking up the tension/power in the final confrontation. "The Lass of Aughrim" also features in a recent film, "Nora", that is Nora Barnacle, Joyce's wife ("she'll stick to him...").