Sima Yue vs Tiberius II

Sima Yue, Prince of Donghai, defeated and executed Sima Ying, consolidating his power as the last surviving major prince in the War of Eight Princes. This victory ended the civil war but left the Jin dynasty fatally weakened.

After Emperor Hui's death, Sima Yue installed Sima Chi as Emperor Huai, becoming regent. He controlled the court but faced growing threats from Xiongnu and Xianbei rebellions, as the Jin dynasty's authority collapsed.

Sima Yue died of illness while campaigning against the Xiongnu rebel Shi Le. His death left the Jin court defenseless, leading to the Capture of Luoyang by Han Zhao forces and the collapse of Western Jin.

Emperor Justin II, incapacitated by madness, appointed Tiberius as Caesar and regent. Tiberius effectively ruled the empire while Justin II remained nominal emperor, stabilizing the government after a period of crisis.

Tiberius II continued the war against the Sassanid Persians, achieving some successes in Armenia and Mesopotamia. However, the conflict remained inconclusive and drained the empire's resources.

Upon the death of Justin II, Tiberius II Constantine became the sole emperor. His accession was welcomed by the populace due to his reputation for generosity and competent administration.

Upon becoming emperor, Tiberius II distributed a large portion of the imperial treasury to the poor and the army. This act of generosity earned him great popularity but depleted the state's financial reserves.