Gang Hong-rip was a Korean general during the Joseon Dynasty. Under repeated requests from Ming China, Gwanghaegun commanded Gang Hong-rip to help Ming forces with ten thousand soldiers against the Manchus in 1619. However, Ming armies were crushed in the Battle of Sarhū. The Korean army under command of Liu Ting lost two-thirds of his troops at Fuca and surrendered to Nurhaci. Official Korean records say that Gwanghaegun had ordered a betrayal to Nurhaci, but it is suspected to be a defamation by the Westerners faction, who deposed the king. In 1620 almost all Korean captives were released but Gang Hong-rip, who had good command of the Manchu language, was still kept.