Cath Áth an Chip, meaning the Battle of Ath an Chip", alias “Battle of Connacht", was a battle fought in 1270 between armies of the Kingdoms of Connacht and England at county Leitrim in Ireland. The result was a decisive Irish victory. "Athanchip", then a ford marked by a tree-stump", is today the place called "Battle bridge". The battle site is probably Drumhierney townland and Leitrim village.
Background
was King of Connacht during the Norman invasion of Ireland. He initially attempted to arrest the expansion of Norman settlements in Connacht, but eventually capitulated to King Henry II. His son Aedh did not favour the diplomatic approach. Even during his father's reign, Aedh attacked the Normans at every opportunity. In 1249 he ambushed Piers de Bermingham, who at the time held the wardship of the de Burgh lands. This ambush led to all-out war and resulted in Fedlimid being deposed. He regained his throne in 1250 but was much weaker as a result.
Battle
Aedh became king after his father's death in 1265. He continued to raid settled lands in his kingdom. In 1269 Robert d'Ufford, the new justiciar in Ireland, began building a royal castle in Roscommon. D'Ufford sent his deputy across the River Shannon to join his ally, Walter de Burgh, 1st Earl of Ulster. The combined forces met with Aedh to negotiate but to no avail. The forces under de Burgh retreated and attempted to ford the Shannon at Áth-an-Chip. Aedh routed the army and destroyed the castle at Roscommon. The battle occurred at Maigh Nissi, in the barony of Leitrim, County Leitrim. Connellan states "". Moynissy was the Gaelic place name for the flat, unforested part, of the barony of Leitrim, bordering the Shannon. The Irish Annals describe the Anglo-Normans crossing Ath-Cara-Conaill before marching onward to Ath-an-cip. Places corrupted as "Ath an Chip" and all variants were a ford marked by a large tree stump. Ath an Chip was clearly a ford on the River Shannon. MacNamee states "". At Leitrim village the R284 roadcrosses the Shannon at "Battle-bridge". The townland at this bridge is Drumhierney. Without certainty the battle-site was Drumhierney townland in county Leitrim.
Aftermath
The death of de Burgh in 1271 ended all effective resistance to Aedh's rule in Connacht. Aedh continued to raid as far east as Granard and even burnt Athlone, destroying the bridge there. The raiding came to an end with Aehd's sudden death on 3 May 1274. The Kingdom of Connacht became embroiled in a civil war with thirteen kings during the period between 1274 and 1315. This instability left Connacht vulnerable to Norman settlement.
