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.
Yun Posun
Yun Posun (; or ; August 26, 1897 – July 18, 1990) was a Korean independence activist and politician, who served as President of South Korea from 1960 to 1962 before being replaced by the long-serving Park Chung-hee as a result of the May 16 coup in 1961.