In Ireland, the combined forces of Munster and Meath crushed a rebellion by Leinster and Dublin.

AD 999

Calendar year

Year 999 (CMXCIX) was a common year starting on Sunday of the Julian calendar.

Kingdom of Munster

Kingdom in South Gaelic Ireland

The Kingdom of Munster was a kingdom of Gaelic Ireland which existed in the south-west of the island from at least the 1st century BC until 1118. According to traditional Irish history found in the Annals of the Four Masters, the kingdom originated as the territory of the Clanna…

Kingdom of Meath

Kingdom in east-central Ireland (1st–12th centuries)

Meath was a kingdom in Ireland from the 1st to the 12th century AD. Its name means "middle," denoting its location in the middle of the island.

Battle of Glenmama

Part of the Viking wars in Ireland

The Battle of Glenn Máma or Glenmama took place most probably near Lyons Hill in Ardclough, County Kildare, Ireland, in AD 999 between Windmill Hill and Blackchurch. It was the decisive and only engagement of the brief Leinster revolt of 999–1000 against the King of Munster,…

List of kings of Leinster

The kings of Leinster ruled from the establishment of Leinster during the Irish Iron Age until the 17th century Early Modern Ireland. According to Gaelic traditional history found in works such as the Book of Invasions, Leinster was created during the division of Ireland among…

Kingdom of Dublin

Norse-Gael state on the eastern coast of Ireland from 853 to 1170

The Kingdom of Dublin was a Norse kingdom in Ireland that lasted from roughly 853 AD to 1170 AD. It was the first and longest-lasting Norse kingdom in Ireland, founded by Vikings who invaded the territory around Dublin in the 9th century. Its territory corresponded to most of…