Song Yo-chan
Song Yo Chan was prime minister of South Korea from 3 July 1961 to 16 June 1962. Previously, he had been the Head of the Ministry of Foreign Affairs and Trade from 22 July 1961 - 10 October 1961 and was a Lieutenant General. He ordered the arrest of corrupt officers in the army.
He had studied politics and economics at George Washington University in Washington, D.C. During the final days of the First Republic of South Korea of president Syngman Rhee, he declared martial law and forced the president to resign. Song Yo Chan refused to quell the student-led protesters even though the police asked for bullets and troops. The protests are known as the April Revolution.