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1950 CIA document stating that after the North Korean army entered Seoul, more than 50% of Seoul students were aiding communists and volunteering for the Northern army, and that the working class generally supported the North:

Past failure of the Republic of Korea to win the support of its restless student class may lie behind reports that over 50% of Seoul's students are actively aiding the Communist invaders, with many voluntarily enlisting in the Northern Army. Apparently attracted by the glamor of a winning army, the morale of these recruits may suffer rapidly if the going gets tough. Among others elements of Seoul's population, the working class generally supports the Northern Koreans, while merchants are neutral and the intelligentsia continue to be pro-Southern. A former Seoul policeman reports that North Korean troops and police are rather inconspicuous in Seoul. Commercially, the city is nearly "dead"; stores are closed except for two department stores and some greengrocers. The streets, however, are crowded, especially with youths engaging in Communist demonstrations.^[1]