King Fuchai of Wu vs Muyeol of Silla

King Fuchai of Wu defeated the state of Yue at the Battle of Fujiao. He captured King Goujian of Yue and took him as a hostage, but later released him after Goujian feigned submission, a decision that proved fatal.

Fuchai, persuaded by his minister Bo Pi and deceived by Goujian's apparent loyalty, released the Yue king. This act of clemency allowed Goujian to return to Yue and secretly rebuild his strength for revenge.

Fuchai convened a meeting of feudal lords at Huangchi and was recognized as hegemon. However, while he was away, Yue attacked Wu's capital, weakening Wu and exposing the vulnerability of his overextension.

Yue forces under Goujian conquered Wu. Fuchai, surrounded and defeated, committed suicide. His death ended the Wu state, and his earlier decision to spare Goujian was seen as the cause of his downfall.

King Muyeol, as crown prince, negotiated a military alliance with the Tang dynasty of China. This alliance provided Silla with Chinese military support against Baekje and Goguryeo, setting the stage for the unification of the Korean Peninsula.

Muyeol appointed General Kim Yushin as the supreme commander of Silla's military forces. Kim Yushin's leadership was instrumental in the campaigns against Baekje and Goguryeo, and his strategic genius became a cornerstone of Silla's unification efforts.

Muyeol, as king, led Silla forces in a joint campaign with Tang China to conquer Baekje. The allied army captured the Baekje capital, Sabi, and the kingdom fell. This victory eliminated one of Silla's major rivals and was a crucial step toward unification.

Muyeol died while Silla was still at war with Goguryeo. His death occurred before the final unification was achieved, but his alliance with Tang and conquest of Baekje had already set the course for Silla's eventual victory under his successor, King Munmu.