Unification of Georgia
On 31 March 1000, Bagrat III’s adoptive father, David III Kuropalates, died, possibly as a result of assassination. According to the Georgian Chronicle of Vakhushti, the lands of Tao fell into desolation following his death. Because David had been compelled to bequeath Tao to the Byzantine Empire after his involvement in the revolt of Bardas Phokas, Emperor Basil II, moved to claim the territory by force. Returning from a campaign in Syria against the Fatimid caliph, Basil faced little resistance: the local nobility, unwilling to challenge such a powerful monarch, recognized Byzantine suzerainty and rejected the authority of Bagrat III. Within months, the emperor completed the conquest of Tao-Klarjeti. To manage local politics, he conferred the title of magistros upon Bagrat’s father Gurgen, while granting the title of Kouropalates to Bagrat himself. This move was intended to set father and son against each other, but no conflict ensued, as Gurgen was regarded as a loyal and upright parent. Bagrat thus became King of Abkhazia and Kouropalates of Iberia, achieving the effective unification of western Georgia, though he simultaneously lost much of his ancestral inheritance to Byzantium.
In 1008, following the death of his father Gurgen I, Bagrat inherited the hereditary title of “King of the Georgians” together with the duchy of Lower Tao–Javakheti. Having united under his authority all the lands ruled by members of the Bagrationi dynasty, Bagrat turned his attention to eastern South Caucasus. His first target was David of Kakheti, prince and chorepiscopus of Kakheti. Bagrat demanded the return of territories annexed by David after his victory in the Kartli war of 978. David refused and declared his intention to resist. In retaliation, Bagrat invaded Kakheti, marching through Kartli and devastating Hereti, an eastern province of the principality. He installed a certain Abulal as mtavari (“count”) of the region, but the local nobility soon overthrew him, regained control of Hereti, and joined their lands to Kakheti.
After learning of the revolt in newly annexed Hereti, Bagrat III assembled his forces and resumed the campaign. He quickly completed the annexation of Hereti, subdued the local nobility in Imereti (western Georgia), and placed the relics of the country’s first Orthodox queen in the region as a symbolic gesture of authority. In 1008, Bagrat launched the conquest of Kakheti, which he completed by 1010 with relatively little resistance. He initially left the fortress of Bodchorma in the hands of Prince Kvirike III of Kakheti, son of Chorepiscopus David, but soon deprived him of it and annexed the principality outright. By the conclusion of this war, Bagrat III had become the undisputed ruler of all Georgia. He had completed the political unification of the country and assumed the royal title of “King of the Abkhazians, Kartvelians, Rans, and Kakhs.”