Important Historical Events of the year 999, Year 999 in History

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List of 999 Major News Events in History, Most Important Historical Events in 999

What happened in the year 999?

Date	Event
December 30, 999	Battle of Glenmama: The combined forces of Munster and Meath under king Brian Boru inflict a crushing defeat on the allied armies of Leinster and Dublin near Lyons Hill in Ireland.