In Korea too resentment of Japanese policies and actions in the past still rankles. After Korea was annexed by Japan in 1910, the economy was restructured to serve Japanese interests, and attempts to achieve cultural assimilation eventually went so far as to prohibit use of the Korean language in schools, publications, and official documents. The sexual exploitation of thousands of Korean "comfort women" during WW II is only the most well-known of the many grievances harbored by Koreans against their neighbors to the east. Despite numerous acts of Korean resistance during the years of Japanese occupation, none could prevail against superior Japanese military might until the defeat of Japan in 1945.