Duke Mu of Qin vs King Muyeol

Duke Mu of Qin led campaigns against the Rong and Di barbarian tribes to the west, conquering twelve minor states and opening up 1,000 li of territory. This expansion strengthened Qin and secured its western flank.

Duke Mu formed an alliance with the state of Jin, marrying his daughter to Duke Hui of Jin. However, when Jin reneged on promises, Duke Mu attacked and defeated Jin at the Battle of Han, capturing Duke Hui.

Duke Mu supported the exiled prince Chong'er, sending troops to help him return to Jin and become Duke Wen. This act created a powerful ally but also a future rival who would challenge Qin's dominance.

Duke Mu's attempt to expand eastward was thwarted by Jin at the Battle of Yao. Qin forces were ambushed and destroyed in a narrow pass, forcing Duke Mu to abandon eastern ambitions and focus on the west.

Muyeol became king of Silla, beginning a period of alliance with Tang China that would lead to the unification of the Korean Peninsula.

Muyeol secured a military alliance with the Tang dynasty of China, agreeing to jointly conquer Baekje and Goguryeo. This alliance was crucial for Silla's unification efforts.

Muyeol led Silla forces, in coordination with the Tang army, to conquer Baekje. The fall of Baekje was a major step toward the unification of the Korean Peninsula under Silla.

Muyeol died before the conquest of Goguryeo was completed. His son, Munmu, succeeded him and finished the unification process.