In Korea, segregation was built into everyday life. Japanese and Koreans lived in virtually segregated communities. The colonial education system, unwilling to intermix large numbers of Koreans with Japanese, segregated students into two separate and unequal systems. As a result, inferior education blocked the social advancement of Koreans. Intermarriage between Koreans and Japanese was comparatively rare, while many who did marry found themselves ostracized from Korea-based Japanese society. Japan reinforced the second-class status of Koreans by limiting employment opportunities and denying representation in the political institutions Japan constructed for Korea. Japanese colonial policy during World War II enabled some improvement, as Koreans were promoted in government and factory positions to replace Japanese recalled home or sent to the battlefront. Japanese Assimilation Policies in Korea, 1910-1945 also examines the diverse views held by Koreans regarding Japan's colonial policy.