The Annals of Ulster use the Old …
Years: 859 - 859
The Annals of Ulster use the Old Irish title rí hÉrenn uile, that is "king of all Ireland,” for Máel Sechnaill mac Maíl Ruanaid, distinguishing him from the usual Kings of Tara who are only called High Kings of Ireland in late sources.
The annals record expeditions to Munster to obtain tribute and hostages in 854, 856 and in 858, when his army had killed several kings, wasted the land and marched south to the sea.
Máel Sechnaill's attempts to obtain the submission to the Munster kings of the Eóganachta have been obstructed by the ambitious king of Osraige in Leinster, Cerball mac Dúnlainge.
Cerball, known to Icelanders' sagas as Kjarvalr Írakonungr, raids Munster and obtains allies and mercenaries from among the Norse and Norse-Gaels of southern Ireland.
The Fragmentary Annals of Ireland, a combination of annals and history written in the eleventh century for Donnchad mac Gilla Patraic king of Osraige and Leinster, say that the expedition of 854 had been led by Cerball on Máel Sechnaill's orders, although Máel Sechnaill himself appears also to have raided into Munster that year.
The Annals of Innisfallen are alone in reporting an expedition in 859 by Cerball with allies from Munster against Máel Sechnaill, which is said to have reached as far north as Armagh.
A general assembly of kings and clerics in 859 at Rahugh in County Westmeath settles matters by detaching Osraige from Munster and combining it with Leinster as a subject kingdom.
Máel Gualae mac Donngaile of Munster and Cerball both consent to the change which is little loss to the Eóganachta who had but rarely exercised any control over Osraige.
