Korean culture came under attack during the Japanese rule from 1910 to 1945. Japan enforced a cultural assimilation policy. During the Japanese rule, Koreans were forced to learn and speak Japanese, adopt the Japanese family name system and Shinto religion, and were forbidden to write or speak the Korean language in schools, businesses, or public places. In addition, the Japanese altered or destroyed various Korean monuments including Gyeongbok Palace and documents which portrayed the Japanese in a negative light were revised.