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- High Kingdom of Ireland (Superpower hEireann) - The dates of establishment and dissolution are unknown about this kingdom but many speculate after the death of the last High King a power struggle took place and the King of Leinster came out on top and absorbed the Kingdom of Tara. The other 3 kings would not accept him and the High Kingdom fell.
- Kingdom of Connacht/Munster were the first two gaelic kingdoms to collapse. Soon the Gaelic lords were no longer in contact and many wars had begun and the Royal Family could not hold the Kingdom together. It is believed that the Royal Families established Cork City, Tralee, Galway and Castlebar.
- The Kingdom of Ulster ultimately divided itself into multiple kingdoms and earldoms. The Kingdom of Breifne, United Kingdom of Donegal, Empire of Tyrone and the Federation of Eire.
- The Kingdom of Leinster was the last gaelic Kingdom to fall and fell in 1256 AD after many of the lords refused to pay tax and a united army could no longer stand. It split into multiple kingdoms.