Battle of Knocknanuss
1647 CE.
Shown on the map at 52.520°, -7.890°.
The Battle of Knocknanauss was fought in 1647, during the Irish Confederate Wars, part of the Wars of the Three Kingdoms, between Confederate Ireland’s Munster army and an English Parliamentarian army under Murrough O’Brien. The battle resulted in a crushing defeat for the Irish Confederates.
Text from the Wikipedia article Battle of Knocknanuss, licensed CC BY-SA 4.0.