During the Nine Years' War, a coalition of Irish lords led by Hugh O'Neill fought against the army of the Kingdom of England. In the southern province of Munster, one of these lords was Donal Cam O'Sullivan Beare who was based in the Beara Peninsula in modern County Cork. After the fall of Kinsale in 1601, O'Sullivan remained one of the few Irish leaders in the region who continued to fight. In early 1602, with English forces tightening their grip, O'Sullivan went north to Ulster to consult with O'Neill. In June, the English attacked Dunboy Castle, one of the more prominent forts in O'Sullivan territory. While O'Sullivan had returned south from Ulster, he was not present at the siege. While the English army besieged Dunboy Castle, an English detachment under George Carew attacked a small fort on the island of Dursey about 20 km away. This fort reportedly housed a group of Irish civilians taking refuge from the fighting in the region.
Massacre
O'Sullivan had hidden a group of civilians, including old men, women and children on the island to protect them from the violence in the area. Approximately 40 Irish soldiers and mercenaries were stationed there to defend the fort. An English force of several hundred men and some cannons landed on the island in boats. According to varying accounts, the Irish, after initial skirmishes, accepted surrender, with the promise of their lives, when it was offered by Carew. According to a later account written by the nephew of Dónal Cam, PhilipO'Sullivan Beare, the English reneged on the terms of surrender and killed scores of the survivors. According to Philip O'Sullivan Beare's account, some of those killed were bound and thrown from nearby cliffs onto the rocks below. The entire group of over three hundred people were killed in the massacre.
Aftermath
Meanwhile, at nearby Dunboy, the outnumbered defenders were overrun and Dunboy Castle fell. The entire Irish company of 143 soldiers died, with 85 killed in the assault and 58 executed afterwards. After the fall of Dunboy, O'Sullivan retreated north to West Breifne in modern County Leitrim. This long journey is commonly known as "O'Sullivan's March". On the march, hundreds died to attacks and exposure, while more settled along the way. In the end, of the 1,000 people who left the Beara Peninsula, just 35 remained. Upon arrival in the north, O'Sullivan put together a force to continue the fight, but the Irish alliance surrendered in March 1603, following O'Neill's surrender and the subsequent Treaty of Mellifont.
