'The Battle of Roes an Rig' is an Irish mythical tale about a battle fought by the legendary Conchobar, King of Ulster. Conchobar falls ill and doesn't eat or sleep. The Ulaid ( people of Ulster) ask their wizard Cathbad to find out what's wrong with their king. Conchobar tells Cathbad that he is ill because the other four provinces of Ireland have made war against him with impunity. When they mobilize an army to defeat him, he sets up his camp at Roes an Rig on the River Boyne. The ensuing battle will take many casualties…