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East Asia

In East Asia by the ninth century, populations centered mostly around merchant activities in coastal Shandong and Jiangsu. Wealthy benefactors including Jang Bogo established Silla Buddhist temples in the region. Jang Bogo had become incensed at the treatment of his fellow countrymen, who in the unstable milieu of late Tang often fell victim to coastal pirates or inland bandits. After returning to Silla around 825, and in possession of a formidable private fleet headquartered at Cheonghae (Wando), Jang Bogo petitioned the Silla king Heungdeok (r. 826–836) to establish a permanent maritime garrison to protect Silla merchant activities in the Yellow Sea. Heungdeok agreed and in 828 formally established the Cheonghae (淸海, "clear sea") Garrison (청해진) at what is today Wando island off Korea's South Jeolla province. Heungdeok gave Jang an army of 10,000 men to establish and man the defensive works. The remnants of Cheonghae Garrison can still be seen on Jang islet just off Wando's southern coast. Jang's force, though nominally bequeathed by the Silla king, was effectively under his own control. Jang became arbiter of Yellow Sea commerce and navigation.

From the 13th century, Wokou based in Japan made their debut in East Asia, initiating invasions that would persist for 300 years. The wokou raids peaked in the 1550s, but by then the wokou were mostly Chinese smugglers who reacted strongly against the Ming dynasty 's strict prohibition on private sea trade.

During the Qing period, Chinese pirate fleets grew increasingly large. The effects large-scale piracy had on the Chinese economy were immense. They preyed voraciously on China's junk trade, which flourished in Fujian and Guangdong and was a vital artery of Chinese commerce. Pirate fleets exercised hegemony over villages on the coast, collecting revenue by exacting tribute and running extortion rackets. In 1802, the menacing Zheng Yi inherited the fleet of his cousin, captain Zheng Qi, whose death provided Zheng Yi with considerably more influence in the world of piracy. Zheng Yi and his wife, Zheng Yi Sao (who would eventually inherit the leadership of his pirate confederacy) then formed a pirate coalition that, by 1804, consisted of over ten thousand men. Their military might alone was sufficient to combat the Qing navy. However, a combination of famine, Qing naval opposition, and internal rifts crippled piracy in China around the 1820s, and it has never again reached the same status.

In the 1840s and 1850s, United States Navy and Royal Navy forces campaigned together against Chinese pirates. Major battles were fought such as those at Ty-ho Bay and the Tonkin River though pirate junks continued operating off China for years more. However, some British and American individual citizens also volunteered to serve with Chinese pirates to fight against European forces. The British offered rewards for the capture of westerners serving with Chinese pirates. During the Second Opium War and the Taiping Rebellion, piratical junks were again destroyed in large numbers by British naval forces but ultimately it was not until the 1860s and 1870s that fleets of pirate junks ceased to exist.

Chinese Pirates also plagued the Tonkin Gulf area.