Map of the Kingdom's Warfare.

Summary

Zhang Xuan led his troops on an expedition to Goguryeo while the Tang army faced challenges from four warlords: Xue Ju, Li Gui, Liang Shi Dou, and Liu Wuzhou. After setbacks, the Tang army retreated to Taiyuan, focusing on countering these factions. Significant progress was made, leading to the defeat and execution of Li Gui, while Xue Ju was assassinated, resulting in further victories for the Tang. Li Shi Min led a successful campaign against Liang Shi Dou, but logistical issues arose due to the harsh climate and supply line disruptions. An urgent report from Chang'an ordered Li Shi Min to withdraw his troops to address a changing situation in Nakahara, causing concern among his generals about losing the momentum against Liang Shi Dou. Despite their arguments to continue the campaign, Li Shi Min ultimately decided to return to Chang'an, appointing General Duan to defend key counties.

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