Gang Gam-chan vs Shi Siming

Gang Gam-chan defended the fortress of Heunghwajin against Khitan forces during the Second Goryeo-Khitan War. The siege ended with a Goryeo victory, delaying the Khitan advance.

Gang Gam-chan commanded Goryeo forces at the Battle of Kwiju against the Khitan Liao dynasty. His army decisively defeated the Khitan invaders, ending the Third Goryeo-Khitan War and securing Goryeo's independence.

Shi Siming, a fellow general and friend of An Lushan, joined the rebellion from the outset. He commanded forces in the northern theater, securing key territories in Hebei and Shanxi for the Yan dynasty.

After An Lushan's assassination, Shi Siming briefly submitted to the Tang court. He was pardoned and given a military command, but he remained suspicious of Tang intentions and soon rebelled again.

Shi Siming rebelled again, killing An Qingxu and seizing control of the Yan dynasty. He declared himself emperor and continued the war against Tang, proving to be a more capable commander than An Qingxu.

Shi Siming defeated Tang forces at Yancheng (modern Anyang), killing the Tang general Li Guangbi's ally. This victory allowed him to consolidate control over the Yellow River valley and threaten Luoyang.

Shi Siming was assassinated by his son Shi Chaoyi, who feared being replaced as heir. The patricide weakened the Yan dynasty, leading to internal strife and eventual defeat by Tang forces in 763.