The existence of these primitive defences, coupled with the good-view afforded from the top of Moira hill, made the settlement strategically valuable. Proximity to Lough Neagh enhanced this value. Accordingly, during the repeated power struggles of the first millennium the area was often fought over, and eventually witnessed the largest battle in the history of Ireland when three tribal kings contested the area to determine supremacy in Ulster and beyond. This was the Battle of Moira. Its impact on Moira is still felt; two townlands still bear battle names, Aughnafosker (meaning field of slaughter) and Carnalbanagh (meaning the Scotsman's grave). After the battle a bishop by the name of Ronan Finn (who was later canonized) was alleged to have created a monastery in the area.