 Dál Riata was divided into a small number of regions, each controlled by a particular kin group; according to the "Senchus fer n-Alban" ("The History of the Men of Scotland"), it was the Cenél nÓengusa for Islay and Jura.In 627 the son of a king of the Irish Uí Chóelbad, a branch of the Dál nAraidi kingdom of Ulster (not to be confused with Dál Riata), was killed on Islay at the unidentified location of Ard-Corann by a warrior in an army led by King Connad Cerr of the Corcu Réti (the collective term for the Cenél nGabráin and Cenél Comgaill, before they split), based at Dunadd.The "Senchus" also lists what is believed to be the oldest reference to a naval battle in the British Isles—a brief record of an engagement between rival Dál Riatan groups in 719.