The Baek-ui-sa (백의사, WSS, White Shirts Society) was a far-right, fascist, anti-communist terrorist organization focused on White Terror. They assassinated key Korean figures such as Lyuh Woon-hyung and Kim Gu.
The name of the group was inspired from the Blue Shirts Society, a secret ultranationalist fascist faction in the Kuomintang in China. This group was funded by the American Counterintelligence Corps (CIC) https://web.archive.org/web/20070418012454/http://www.kimsoft.com/2002/cilley.htm
https://ko.wikipedia.org/wiki/%EB%B0%B1%EC%9D%98%EC%82%AC
Assassin of Kim Gu Had Links Both to U.S. and to Terror Unit by Jung Chang-hyun https://koreajoongangdaily.joins.com/2003/01/05/socialAffairs/Assassin-of-Kim-Gu-Had-Links-Both-to-US-and-to-Terror-Unit/1894423.html
Ahn Doo-hee, who assassinated Kim Gu, president of Korea’s Interim Government in Shanghai during Japanese colonial rule, was an agent for both the U.S. Counter Intelligence Corps and an ultra-right terrorist group known as “Baekuisa,” a declassified document of the U.S. National Archives and Records Administration showed.
Kim Gu’s Assassin, Ahn Doo Whi, was an American Agent