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840 CE
850 CE
860 CE
870 CE
880 CE
890 CE
900 CE
910 CE
848 CE - 916 CE: Life of Flann Sinna.
879 CE - 916 CE: Reign of Flann Sinna, High King of Ireland.
887 CE: Flann Sinna defeated by Sichfrith son of Imair of Dublin at the Battle of the Pilgrim.
901 CE: Flann Sinna's son Donnchad Donn rebels; Flann slaughters his associates at Kells.
908 CE: Flann Sinna defeats the armies of Munster at the Battle of Ballaghmoon.
910 CE: Kingdom of Breifne rebels; Flann Sinna crushes the revolt.
913 CE: Kingdom of Brega rebels; Flann Sinna crushes the revolt, destroys churches and monasteries in the region of Brega.
915 CE: Flann Sinna's sons Donnchad Donn and Conchobar rebel; are defeated by Flann's vassal Niall Glundub.
916 CE: Flann Sinna dies; is succeeded by Niall Glundub as High King of Ireland.