Map of the Kingdom's Warfare.

Summary

Zhang Xuan prioritized the development of the navy over cavalry for the Qingzhou Army, recognizing its cost-effectiveness in reducing labor needs during warfare. His naval forces played a crucial role in the Goguryeo War, efficiently mobilizing supplies with significantly fewer laborers compared to previous campaigns. A naval fleet led by General Zhu Kuan was tasked with eliminating supplies hidden by Du Fuwei along the Yangtze River. Zhu Kuan, previously overlooked by the Sui Dynasty, found renewed purpose under Zhang Xuan's command. As Zhu Kuan investigated the Huang family's warehouse, he faced the dilemma of potentially offending the influential family. Upon encountering a fleet, he met Zhang Xuan, who encouraged him to proceed with the search. They discovered hidden ships linked to Du Fuwei, leading to the capture of the steward and the revelation of grain stores not belonging to the Huang family.

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