Brian Boru's March is a traditional Irish tune.
Brian Boru was a High King of Ireland who founded the O'Brien dynasty. [1]
In 1842, a version of the song was published by Dublin Monthly Magazine [2] . In 1969, the song was recorded by The Chieftains. [3] Horslips used it in 1976, as the intro and basis for "Trouble (With a Capital T)" from the album The Book of Invasions. [4]