981 - 990 AD
981 *107.Malachy 11 / Mael Sechnaill the Heremonian Dal Cuinn Ui Niaill Clann Cholmain 174th King of Ireland defeated the Viking forces who were attacking Tara in Co. Meath in the south - east of Northern Leinster this year, who were constantly invading his territory there from out of their settlement to the south in Dublin in Co. Dublin in the north - east of Southern Leinster.
*105.Brian Boru - of the Tributes who was now the Heberian Dal gCais Ui Bloid Ui Turlough King of Thomond / Northern Munster and also the 41st King of Cashel / Munster, besieged the Heremonian Ui Laoghaire Ui Connla kingdom of Ossory in Co. Kilkenny in the south - west of Southern Leinster, which was situated in Mogha's Half / Southern Ireland, to the east of the Munster Province, to begin his total subjection of the Vikings there also, and to show his overall authority over the whole of Mogha's Half.
982 AD
*107.Malachy 11
/ Mael Sechnaill
the
Heremonian Dal Cuinn southern
Ui Niaill Clann
Cholmain 174th King of Ireland was able to defeat
the Vikings in Dublin in Co. Dublin in the north - east of
Southern Leinster
this year and gain control of the territory there, while attempting to stop their constant raids
from there into his territory to
the north in Northern Leinster.
For political reasons and hoping to create immediate
goodwill he then put the Viking settlement
there under the control of
Sitric Silkbeard the the half - Viking
King, who was a son of 110.Gormlaith and
the recently deceased Viking King,
Aulaf's / Olaf Cuaran. To
expand his political influence there further, he was
983 Despite the best efforts of *107.Malachy 11, *105.Brian Boru the Heberian Dal gCais King of Thomond / Northern Munster and the 41st King of Cashel / Munster this year was able to also bring Southern Leinster totally under his control, and he also gained hostages from the Septs there for their good behaviour there in Mogha's Half (Southern Leinster and Munster Province.)
984 *105.Brian Boru as the Heberian Dal gCais 41st King of Cashel / Munster was now supreme in Mogha's Half / Southern Ireland, and he was on the way to also eventually subjecting *107.Malachy 11 / Mael Sechnaill the Heremonian Dal Cuinn southern Ui Niaill Clann Cholmain 40th King of Meath and 174th King of Ireland, as well as the Connacht Province in the west, and the Ulster Province in the north. He was determined to bring the Viking menace in Ireland under his overall control and to an end.
Eochy O Flynn / Eochaidh Ua Floinn the Chief Ollamh of Ireland, died.
986 Brian O Hea the Heberian Dal gCais Erenagh of the Egles Beg of Clonmacnoise in Co. Offaly in Southern Leinster, died.
987 The
Mac Namaras
from the Heberian
Ui Caisin Sept were descended from 92.Caisin, the second
eldest son of the 12 sons of
91.Cas the direct male line ancestor of all the
Dal gCais / Dalcassian
Septs. The
Mac Namaras acted as the Lord Marshalls for *105.Brian
Boru who was now the King
of Thomond / Northern Munster
and
41st King of
Cashel / Munster,
who was descended from the eldest son of
91.Cas, 92,Blood /
Blod (Ui Bloid).
This year, the
Mac Namaras
hoping to extend the overall authority of
*105.Brian
Boru
in
Ireland,
took the
Dalcassian aristocratic warriors, who were under their
command, and besieged the
Heremonian Dal
Cuinn
Septs in the
Connacht Province, but
they were not
led by *105.Brian
Boru himself, and they were
defeated by the
Heremonian Dal Cuinn Ui
Briuin Septs there who were now under the leadership of
110.Cathal
O Connor the
Dal Cuinn Ui Briuin Ai Siol Muireadhaigh
46th
King of Connacht.
*105.Brian
Boru
as
the Heberian Dal gCais
King of Thomond
and
41st King of
Cashel / Munster meanwhile had begun to
restore the old Celtic values, and being very religious he also built many
churches, and repaired the monasteries, and old seats of education, which he also revived, as he sought
books of learning in many foreign lands, and constructed roads and bridges. He
also improved
the original Palace of the
Dal gCais
Ui Bloid Ui Turlough
Sept
at Kincora in Co. Clare in the north - west
Munster Province. By
this time also the
Vikings too were now also settling into the Celtic Gaelic way of
life, and *105.Brian
Boru
decreed that if they wanted to remain in Mogha's
Half in
Ireland they should also serve
him in times of conflict.
988 Endeavouring to extend his overall authority further, *105.Brian Boru the Heberian Dal gCais King of Thomond and 41st King of Cashel / Munster besieged the Dal Cuinn southern Ui Niaill kingdom of Meath, in the south of Northern Leinster, from out of his fleet on Loch Ree, which was the actual territory of *107.Malachy 11 / Mael Sechnaill the Heremonian Dal Cuinn southern Ui Niaill Clann Cholmain 174th King of Ireland. The consistent Viking threat throughout Ireland had totally disrupted the Brehon Law, and also the previous control over the Kingship of Ireland that the Heremonian Dal Cuinn Ui Niaill had held in Ireland for so long, it was now on for one and all, for the survival of the fittest, to see who could gain the overall High Kingship and actually put a stop to the Viking raids. *105.Brian Boru was determined that it would be him.
989 *107.Malachy 11 /
Mael Sechnaill attacked the Viking Danes in Dublin for
20 days and also decided to retaliate
against the previous Heberian Dal gCais insurgency into his kingdom of Meath
in Northern Leinster by besieging the Munster Province
with his Dal Cuinn
Ui Niaill
warriors
this year, and from now on for a few years ahead the Heremonian
Dal Cuinn
southern Ui Niaill
and the Heberian Dal gCais were to continue to engage in
intermittent hostilities. The
position of *107.Malachy 11, as the
High King of Ireland naturally was now
under threat and he needed to re - assert his
Dal Cuinn Ui Niaill authority,
especially over the rising fortunes of
*105.Brian
Boru. This insurgency into his personal kingdom of
Meath also had an effect
on the other Septs in the Connacht Province and
also
in
Southern
Leinster, as they could all now see that
the Dal gCais under the leadership of
*105.Brian
Boru was
growing in overall authority and strength.
105.Marcan who was another
brother to
*105.Brian Boru
was at this time a monk and the Abbot
of Killaloe and also the Bishop of Emly
in Co.
Tipperary in the north - east
of
Munster.
The Vikings
this year captured a scholar at
Ross Carbery (The
Wood of the Ui Cairbre Sept) in Co. Cork in
Southern Munster and demanded a ransom for his return,
and as it was in his territory
105.Brian Boru paid up, and he was released on
Scattery Island on the River Shannon.
990 *107.Malachy 11 the Heremonian Dal Cuinn southern Ui Niaill Clann Cholmain 174th King of Ireland was once again forced to retake the Viking settlement to the south of his territory in Dublin in Co. Dublin in the north - east of Southern Leinster by force from the Vikings there, as they continued on carrying out their raids into his territory to the north in Northern Leinster.