Western Kingdom of the Levantines

The Western Kingdom of the Levantines (: Regnum Levantorum Occidentalis) or the Western Levantine Kingdom was a successor state of Conchobar's Levantine Empire created by the empire's division among the three sons of Emperor Brian III in 917. The western kingdom was given to Brian III's youngest son, Aemon, who ruled the kingdom until his death in 947. It would then be inherited by Aemon's only son, Lorcan, who would rule the kingdom until 978 when the now greatly diminished realm was dissolved after Lorcan was captured during a rebellion by the kingdom's and  vassals.

In 995, Duncan, Mormaer of Dunaird, succeeded in uniting the numerous Carnish lords under his rule. With the Carnish lords once again united under a single ruler, Duncan founded the Kingdom of Carna, becoming its first king and beginning more than a millennia of independent Carnish rule. The founding of the Kingdom of Carna caused Lorcan's eldest son, Brian, to abandon his claim to the lands west of the newly reformed Levantine Empire, recognising that any attempt to re-establish the Western Levantine Kingdom would now be unlikely to succeed.

Brian III's succession
In 917, on his deathbed in Corcra Abbey, Emperor Brian III decreed that upon his death the Levantine Empire would be divided equally among his three sons, as was the custom. The eastern portion of the empire was left to his eldest son, Culmann, the southern portion of the empire, which was made up of the former heartland of Great Levantia, was left to his middle son, Charles, and the western portion of the empire was left to his youngest son, Aemon.

Aemon would rule the Western Kingdom of the Levantines until his death at the age of 51 in 947. Despite his efforts to establish himself as a strong authority over the Western Levantine Kingdom, Aemon's rule was seen as weak by the kingdom's, and  vassals, who had chafed under the rule of Conchobar's Levantine Empire and had no love for his descendants. Aemon's rule was marred by raids from the Ænglish tribes over the kingdom's western border. After capturing Aemon's wife, Daracha, during a raid on the outskirts Colgar in 943, the Ænglish raiders were granted a large swathe of land near the kingdom's eastern border in exchange for Daracha's release. Despite nominally ruling this region as vassals of the Western Levantine Kingdom, Aemon was unable to exercise any real authority over the region's new Ænglish rulers. Aemon's deal with the Ænglish raiders and his inability to establish his authority over their new lands only cemented his status as a weak king in the eyes his Carnish and Gaelic vassals.

Rebellion of 977
After Aemon's death in 947, the Western Kingdom of the Levantines was inherited by his only son, Lorcan. Unlike his father, Lorcan was initially seen as a strong ruler by the kingdom's vassals due to his history as a competent military commander. However, after several military defeats against the Southern Kingdom of the Levantines in 951 and 952, the West Levantine vassal's opinion of Lorcan fell significantly.

Lorcan would suffer a massive military defeat against the Southern Levantine Kingdom in 970, forcing him to concede substantial areas of lands to the Southern Levantines. This military defeat greatly angered the Western Levantine Kingdom's and  vassals, many of whom had grown tired of the rule of Conchobar's descendants and wished to rule themselves once again. This led to a coordinated revolt in 977 by the kingdom's Carnish and Gaelic vassals, who demanded that Lorcan grant them their independence and dissolve the Western Kingdom of the Levantines. The rebellion ended in 978 when Lorcan was captured during a skirmish on the outskirts of Dunaird. In exchange for his freedom, Lorcan signed the Treaty of Colgar, granting independence to his vassals and dissolving the Western Kingdom of the Levantines.

Lorcan continued to claim the lands west of the newly reformed Levantine Empire until his death in 984. Lorcan's son, Brian, maintained the claim until 995 when the Kingdom of Carna was founded, recognising that any attempts to re-establish the Western Levantine Kingdom would now be unlikely to succeed.