Editing Provinces of Ireland (section)

===Early medieval period===
[[File:Ireland900.png|thumb|Ireland's over-kingdoms {{circa|900 AD}}]]
The kingdom of [[Osraige]], which had its genealogy traced back by early Irish genealogists to the Laigin, was part of Mumu from the 6th to 8th century and ruled by the [[Corcu Loígde]] dynasty.<ref name="DuffyMedieval358"/> By the 7th century Osraige had lost their dependence on the Corcu Loígde,<ref name="DuffyMedieval358"/> with the restoration of the local [[Dál Birn]] dynasty. Osraige remained part of Mumu until 859 when [[Máel Sechnaill I]], king of the [[Uí Néill]], forced Mumu to surrender it to his overlordship.<ref name="DuffyMedieval358"/><ref name="Clontarf19"/> After this situation ended it became an independent kingdom which gradually moved towards the Laigin sphere of influence as they sought to claim the Laigin kingship.<ref name="DuffyMedieval358"/> It was during the 9th century that Osraige, ruled by [[Cerball mac Dúnlainge]], became a major political player.<ref name="DuffyMedieval74"/>

Airgíalla had come under the dominance of the Ulaid;<ref name="Clontarf21"/> however, [[Niall Caille]], the son of [[Áed Oirdnide]], brought it under the hegemony of the Northern Uí Néill after defeating the combined forces of the Airgíalla and Ulaid at the battle of Leth Cam in 827.<ref name="Bardonpg14"/><ref name="DuffyMedieval490"/><ref name="Clontarf24"/><ref name="DuffyMedieval12"/>