A lot of ancient battle sites are unknown other than in general terms. Rivers change course, the land changes, towns move expand or contract.
My sisters met a couple Irish gals and brought them over for dinner. When they mentioned they were from Dublin I said “I always wanted to visit Clontarf where Brian Boru won his great victory over the Vikings.”
They were agape - “We are FROM Clontarf!” they said!
I assume they got the impression that Americans were much more familiar with their home town that was actually the case!
We went back to Ireland in 2002. My niece got married in the same church in which my grandfather was baptized in Adare, co. Limerick.