Unlike his predecessor, Tha'laba was an ally of the Roman Empire.
[2] Tha'laba had a son named al-Harith who succeeded him in ruling.
[1][3] His reign lasting for almost 20 years, Tha'laba also built monumental constructions in the deserts near Balqa.
[5][6] Before the rule of Tha'laba, king Amr ibn Jafnah had already signed a treaty with the Roman Empire to ensure peace amongst themselves.
[1][3] The scholar Safiur Rahman Mubarakpuri states that the Arab Lakhmids were formed by the Sasanian ruler Ardashir I (or his son, Shapur I) as a Persian form of resistance against the Romans and their Arab allies.