In 309, after Shi Le's conquered the commanderies of Julu and Changshan, Kong Chang was appointed as Shi's "talon and teeth" along with Zhi Xiong, Kui An, Tao Bao and Lu Ming.
10 Facts About Kong Chang
Kong Chang gathered his generals to plan out his next move as Sima Rui's army approached.
Kong Chang led troops against Mopei and retreated back to the city where Mopei was tricked into pursuing and was captured.
Duan Jilujuan retreated and Kong Chang struck a successful counter-attack as they fled, ending the siege.
Kong Chang's victory caused Liu Kun's army to collapse and prompted his Chief Clerk, Li Hong to hand over Bingzhou to Shi Le.
Shortly after, Kong Chang campaigned against the bandits Ma Yan and Feng Zhu but was recalled after Shi Le decided to wait for their surrender instead.
In 319, Kong Chang conquered all of Pidi's territory in Youzhou, forcing him to join the Jin loyalist Shao Xu at Laoling.
Kong Chang took 11 of Shao Xu's camps while Shi Hu besieged and later captured Shao Xu.
Duan Pidi managed to fight his way back to Yanci, so Kong Chang campaigned against him.
However, Kong Chang had been complacent with his recent victories and did not prepare his defences.