Map of the Kingdom's Warfare.

Summary

Qu Tutong and his allies discussed their strategy regarding Tumen Pass and Feihu Pass, ultimately deciding to attack Tumen Pass due to its favorable terrain and lack of support for the enemy. Qu Tutong led ten thousand troops to Tumen Pass, while Li Shu Liang and Li Jian Cheng prepared their forces for support. Upon arrival, they assessed the Sui army's defenses, noting the presence of a wall and troops. Qu Tutong expressed skepticism about the enemy's defensive strategy, suspecting a trap. Meanwhile, Luo Shi Xin, stationed at Tumen Pass, received orders to retreat but was caught off guard by the Tang army's imminent attack as drums signaled the start of battle.

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