Battle of Landen
Colonel Barrett is noted for raising a regiment of infantry for King James' Irish Army during the Williamite War. In 1690 following the Battle of the Boyne, he was forced to surrender Waterford. In 1691 the Williamite confiscation deprived Barrett, the head of the family at that time, of . He was killed in the French service at the Battle of Landen, alongside fellow Jacobite Patrick Sarsfield, in 1693.