That liminal position, between counties, between landscapes, between powers, may help explain why a site on its outskirts carries the designation "battlefield", a classification rare enough in the Irish record to prompt curiosity on its own terms.

Shrule is most commonly associated with an event from February 1642, in the chaotic months following the outbreak of the 1641 rebellion. A group of Protestant settlers and refugees, who had been granted safe conduct by local Catholic forces, were massacred near the bridge as they attempted to travel south. Estimates of the dead vary considerably across historical sources, but the event at Shrule entered the wider record of 1641 atrocities that would later be gathered in the depositions now held in Trinity College Dublin. The bridge itself, a narrow multi-arched crossing that still stands, became the focal point of the episode in contemporary accounts. That a specific parcel of land near the village retains the formal monument classification of battlefield suggests the violence was localised enough, and memorable enough, to leave a legible mark on the landscape as well as the documentary record.