Yu Dayou

Yu Dayou was appointed as a regional commander in Zhejiang to combat the wokou (Japanese pirates) ravaging the coast. He began organizing local militias and implementing defensive strategies that would later prove effective.

Yu Dayou led a successful naval and land assault on the pirate stronghold at Cengang Island, killing over 2,000 wokou and capturing their leader. This victory disrupted pirate supply lines and secured the Zhejiang coast temporarily.

Yu Dayou collaborated with the general Qi Jiguang to coordinate anti-pirate campaigns in Fujian and Zhejiang. Their combined forces implemented new tactics, including the use of the 'mandarin duck formation,' which improved infantry effectiveness.

Yu Dayou suffered a rare defeat when his forces were ambushed by wokou at Wuyuan, resulting in heavy casualties. The setback led to his temporary demotion, though he was later reinstated due to his overall record.

Yu Dayou retired from military service in his later years and died at age 76. He was remembered as a capable commander who, alongside Qi Jiguang, helped suppress the wokou threat and stabilize China's southeastern coast.