Hi all, I have recently listened to that traditional song, sung by Niamh Parsons. It tells the story of a wild goose (Fergus O'Farrell) and his love (Eily McMahon, the flower of Finae). I need a help to understand some lyrics.

"He fought at Cremona ? she hears of his story He fought at Cassano ? she?s pride of his glory Yet sadly she sings Siubhail a Ruin all the day O come home my darling, come home to Finae."

What is Siubhail a Ruin ?

Later on "Lord Clare in the fields of Rammillies is changing Before him the Sesanach squadrons enlarging Behind him the Cavats, their section display Besides him rides Fergus and shouts for Finae."

What are the Cavats? What does that whole mean?

Many thnaks for your help

Francesco