 In consequence, Dubliners formed part of Ua Conchobair's forces when he marched to Drogheda and Leinster, where he forced the submissions of the kings of Airgialla and Leinster respectively.In fact, Dublin appears to have formed a key part of Ua Conchobair's arsenal, and it is apparent that Mac Murchada was doomed without the support of this coastal-kingdom.Certainly, the twelfth- to thirteenth-century "La Geste des Engleis en Yrlande" relates that Ascall (""MacTurkyl de Diveline"") had abandoned his former overlord, and the eleventh- to fourteenth-century "Annals of Inisfallen" specify that Mac Murchada was only expulsed from Ireland after the Leinstermen and Dubliners had turned against him.