Constantius Chlorus vs Tanshihuai

Constantius Chlorus, as Caesar under Maximian, led a campaign to recover Britain from the usurper Allectus. His forces landed near London and defeated Allectus's troops, restoring Roman control over the province.

Following the abdication of Diocletian and Maximian, Constantius Chlorus became the senior Augustus of the Western Roman Empire. He ruled jointly with Galerius in the East, continuing the Tetrarchy system.

Constantius Chlorus died in Eboracum (modern York) while preparing a campaign against the Picts. His death led to the acclamation of his son Constantine as emperor by the troops, a pivotal moment in Roman history.

Tanshihuai led a large-scale raid into Han territory, attacking commanderies in the northern provinces. The Han forces were unable to stop him, and the raid caused significant destruction and loss of life, demonstrating Xianbei military power.

Tanshihuai united the disparate Xianbei tribes of the Mongolian steppe into a powerful confederation. He established a centralized leadership and expanded Xianbei territory, creating a major rival to the Han dynasty in the north.

Tanshihuai ambushed and defeated a Han punitive expedition in the Yinshan Mountains. The Han commander was killed, and the Xianbei captured large amounts of supplies and weapons, solidifying Tanshihuai's reputation as a formidable military leader.

Tanshihuai implemented a unified legal code for the Xianbei confederation, replacing tribal customs with standardized laws. This reform strengthened central authority and facilitated the administration of the growing empire.