survived to adulthood: the second son, Crown Prince Yi Cheok; the fifth son, Yi Kang, and the seventh son, Yi Un. The Crown Prince, Yi Cheok, became Emperor Sunjong, the last monarch of the Korean Empire. Since Emperor Sunjong never had issue, his younger brother, Yi Un, the Prince Imperial Yeong became the new Imperial Crown Prince. Yi Kang (Prince Imperial Ui), might have taken the position due to his seniority but was passed over - due to the low status of Yi Kang's biological mother, Lady Chang, as well as the notorious fame of Yi Kang himself known not only domestically but also internationally. Yi Kang fathered 13 sons and 9 daughters by 14 mistresses; the number can be different based on difference sources. With an extremely wide range of historical evaluations over him — womanizer, as well as a behind-the-scene leader of the independence movement — the Japanese authorities limited the activities of the prince throughout the occupation. Emperor Sunjong died in 1926, Crown Prince Yi Un was called "King Yi", a nominal title because the country had already lost its sovereignty to Japan. Yi Un married a Japanese princess, Princess Masako of Nashimoto, who was later known as Yi Bangja, a family member of the shinnōke (cadet branch from the Imperial House of Japan). After they married, Princess Masako gave birth to Yi Jin in 1921 (died young) and Yi Ku in 1931. Many members of the Korean imperial family lived in Japan during colonial rule. The last princess of Korea Deokhye, was taken to Japan at a young age, she later married the Japanese count and politician Sō Takeyuki. During the Second World War, princes of the Korean imperial family served as officers of the Imperial Japanese Army. Crown Prince Yi Un achieved the rank of Lieutenant General, commanded Japanese forces in China and became a member of the Supreme War Council. Prince Yi Geon, the first son of Yi Kang, served as a cavalry officer, achieved the rank of Colonel at the end of the war and lived the remainder of his life in Japan. Prince Yi U, the second son of Yi Kang, served as a General Staff Officer with the rank of Lieutenant Colonel when he was killed in the atomic bombing of Hiroshima. After Korea's liberation in 1945, President Syngman Rhee suppressed the imperial family, in order to prevent the restoration of