On 14 May 1631, at Saportseli near
Gori, Teimuraz married his widowed daughter to Crown
Prince Alexander of Imereti. On this occasion, Teimuraz was presented with Shah Safi's
decree confirmed him as a vassal king of Kartli and Kakheti, all of eastern Georgia. Having married Darejan to the Imeretian heir apparent, Teimuraz could now lay a foundation for unification of Georgia's three kingdoms. Alexander became king of Imereti in 1639 and died on 1 March 1660. He recognized no heir;
Bagrat, his son by his first wife, had been disowned by Alexander; Leonti, his son by Darejan, died; he had adopted Luarsab, a son of Darejan's late brother
David, but the boy also died. Prior to his death, Alexander, thus, had to recall his son Bagrat from
Guria and make him his heir. Queen Dowager Darejan crowned Bagrat, but she had no intention of giving up her power. Although both were in their forties, Bagrat had to reckon with his step-mother's ambitions. Three days after Alexander's funeral, Darejan made Bagrat marry her niece
Ketevan. All documents issued in Imereti during these years bore first Darejan's name, and second Bagrat's. As the conflict was brewing, the nobles became divided in two parties. Papuna,
duke of Racha, urged Bagrat to employ the
Ottoman force to remove Darejan, while the queen dowager enjoyed support of the
Catholicos Simon I. == Civil war ==