Animaterra-
It's in common time, so you can sing it to a vast number of melodies. F'rinstance, it will fit just about any Welsh Hymn (or even Men of Harlech or All Through the Night.) For more dignified pomposity, try Hayden's "Austrian Hymn" (Deutschland Uber Alles.) Or you could fit it to a rousing "Halls of Montezuma". Or try it to "Babylon is Fallen" if you want shape note harmonies.