His first reign was brief, lasting from 1419 to 1421, when he and his rival Ulugh Muhammad were defeated by Baraq.

Ulugh Muhammad attempted an invasion of his territory in 1430, but was unable to defeat Berdi and retreated following the death of Vytautas, his main supporter.

Due to the efforts of Hacı I Giray Dawlat was never able to consolidate control over Crimea[2] and was assassinated in 1432.

His son, Äxmät, proved unable to resist the combined forces of Ulugh Muhammad and the Crimean Tatars and was defeated the following year, leading to the creation of the Crimean Khanate.

[3] An unnamed daughter may have become the wife of John IV of Trebizond.