David VI Narin in the context of "List of monarchs of Georgia"

The collapse of the Georgian realm (Georgian: ქართული სახელმწიფოს დაშლა, romanized: kartuli sakhelmts'ipos dashla) was a political and territorial fragmentation process that resulted in the dynastic triumvirate military conflict of the Bagrationi monarchs and war of succession in the united Kingdom of Georgia culminating during the second half of the 15th century.

The fragmentation of the unified realm started in the 13th century during the Mongol invasions that resulted in the establishment of de facto independent Kingdom of Western Georgia led by King David VI Narin and his successors, even though several reunifications would take place that would then bring back monarchy united in fold.

The Kingdom of Western Georgia (Georgian: დასავლეთ საქართველოს სამეფო, romanized: dasavlet sakartvelos samepo), also known as the Kingdom of Imereti, was a late medieval de facto independent fragmented part of the Kingdom of Georgia that emerged during the Mongol invasions of the realm, led by King David VI Narin in 1259 and later followed by his successors. During this period, the kingdom was reduced to the eastern part of the country and placed under Mongol control. Over the decades, the monarchy would fall into chaos and transform into a federation of autonomous principalities unruly of the central or regional royal power and authority.

Most of the occasions, realm would be reannexed into unified fold by the eastern Georgian kings. Nevertheless, the unified Georgian realm would de jure collapse in 1490, and western Georgia would secure an independent future under the name of Kingdom of Imereti, that will exist til 1810.