King Jangsu of Goguryeo vs Shi Le

King Jangsu moved the Goguryeo capital from Gungnae to Pyongyang, constructing a new fortress city. This relocation strengthened control over the southern territories and facilitated expansion into the Korean peninsula.

King Jangsu led a military campaign that captured the Han River basin from the Baekje kingdom, including the capital Hanseong. This victory gave Goguryeo control over a strategic waterway and rich agricultural lands, significantly expanding its territory.

King Jangsu established diplomatic relations with the Northern Wei dynasty of China, exchanging envoys and tribute. This alliance balanced against the Southern Dynasties and secured Goguryeo's northern borders.

King Jangsu forced the Silla kingdom to become a vassal state of Goguryeo after a series of military campaigns. Silla paid tribute and accepted Goguryeo's suzerainty, establishing Goguryeo as the dominant power in the Korean peninsula.

King Jangsu died after a reign of 79 years, the longest of any Korean monarch. His rule saw Goguryeo reach its maximum territorial extent and peak power, controlling much of Manchuria and the Korean peninsula.

Shi Le's forces captured the Western Jin capital Luoyang, taking Emperor Huai prisoner. This event effectively ended Western Jin rule in the north.

Shi Le declared himself emperor of Later Zhao after breaking from the Han Zhao kingdom. He established his capital at Xiangguo, creating a powerful state in northern China.

Shi Le defeated and captured Liu Yao, the emperor of Han Zhao, at the Battle of Xiangguo. This victory eliminated his main rival and consolidated Later Zhao control over northern China.