Korea underwent drastic changes under Japanese rule. Even before the country was formally annexed by Japan in 1910, the Japanese caused the last ruling monarch, King Kojong, to abdicate the throne in 1907 in favor of his feeble son, who was soon married off to a Japanese woman and given a Japanese peerage. Japan then governed Korea under a residency general and subsequently under a governor general directly subordinate to Japanese prime ministers. All of the governor generals were high-ranking Japanese military officers.
In theory the Koreans, as subjects of the Japanese emperor, enjoyed the same status as the Japanese; but in fact the Japanese government treated the Koreans as a conquered people. Until 1921 they were not allowed to publish their own newspapers or to organize political or intellectual groups.
Nationalist sentiments gave rise to a Korean student demonstration in Japan, and on March 1, 1919, to a Proclamation of Independence by a small group of leaders in Seoul. With the consolidation of what became known as the March First Movement, street demonstrations led by Christian and Ch'ondogyo (a movement that evolved from Tonghak) groups erupted throughout the country to protest Japanese rule.