Foreign relations of South Korea
On January 18, 1952 The first president of South Korea Syngman Rhee declared that the vicinity of Dokdo was a territory of South Korea (Syngman Rhee line). Subsequently, some 3,000 Japanese fishermen who conducted fishery operations in this vicinity were captured. This incident, called the Dai Ichi Daihoumaru Ship case strained relations between South Korea and Japan.
Bodo League massacre
In June 1949 the South Korean government accused independence activists of being members of the Bodo League. In 1950, just before the outbreak of the Korean War, the first president of South Korea, Syngman Rhee, had about 20,000 alleged communists imprisoned.