The Korean Empire (Daehan Jeguk, Hangul: 대한제국; Hanja: 大韓帝國) lasted between 1897 and 1910. It was the last time Korea was unified and independent. After the First Sino-Japanese War, Korea was no longer a Chinese tributary state. But then in 1910, Japan annexed Korea. Korea became a Japanese colony until 1945. Then after the Korean War it split.