[1] Colonel Barrett is noted for raising a regiment of infantry for King James' Irish Army during the Williamite War.
He was killed in the French service at the Battle of Landen, alongside fellow Jacobite Patrick Sarsfield, in 1693.
[1] He raised a regiment for King James II during the onset of the Williamite War in Ireland.
Following the Jacobite defeat at the Battle of the Boyne the Williamite army marched upon Waterford where he was forced to surrender the town, under stipulation of returning to Cork with his men and arms.
After the Treaty of Limerick he traveled to France where he served as Colonel in the Irish "Gardes du Roi Jaques" and fought at the Battle of Landen.