After the armistice, South Korea experienced political turmoil under years of autocratic leadership of Syngman Rhee, which was ended by student revolt in 1960. Throughout his rule, Rhee sought to take additional steps to cement his control of government. These began in 1952, when the government was still based in Busan due to the ongoing war. In May of that year, Rhee pushed through constitutional amendments which made the presidency a directly-elected position. To do this, he declared martial law, arrested opposing members of parliament, demonstrators, and anti-government groups. Rhee was subsequently elected by a wide margin.