Mamia regained the government of Mingrelia after his brother's death in 1582, whereupon he instigated Gurieli to incarcerate the late Dadiani's underage son Levan. The boy could not tolerate confinement and, while trying to escape, jumped out of window to his death. The ambitious Dadiani then exploited the incident to attack Guria in 1583. Giorgi Gurieli was defeated and fled to Constantinople. He was able to reclaim his principality with the Ottoman support and depose Mamia's candidate, Vakhtang Gurieli, in 1587.
