Outside Japan, different societies use widely different timeframes in defining Japanese war crimes. For example, the annexation of Korea by Japan in 1910 was followed by the abolition of the traditional class system by Joseon and modernization against the Korean people. Thus, some Koreans refer to "Japanese war crimes" as events occurring during the period shortly prior to 1910 to 1945. Events such as the March 1st movement where 7,000 people were killed and the murder of Empress Myeongseong are considered war crimes in Korea. By comparison, the United States did not come into military conflict with Japan until 1941, and thus Americans may consider "Japanese war crimes" as encompassing only those events that occurred from 1941 to 1945.