On this date, Diệm held a referendum, formally serving as presidential elections between head of state Bảo Đại and head of government Diệm to determine the president of a new, independent Vietnamese state. At the time, Bảo Đại was out of the country and had not been asked to stand as candidate. The referendum introduced universal suffrage with an 18-year voting age and secret voting. However, in practice, voters were given a ballot on which they had to tear off the half featuring the picture of their preferred candidate. The results showed an overwhelming 98.2 percent in favor of Diệm (Hartmann 2001, Asselin 2013). Despite allegations of a manipulated vote, the result reinforced Diệm’s legitimacy and effectively supplanted the internationally recognized State of Vietnam with the Republic of Vietnam in the south, which garnered support from the USA, France, Laos, Taiwan (Republic of China) and Thailand.2 Diệm emerged as a proponent of Vietnamese nationalism, advocating for both anti-communism, as a counterforce to Hồ Chí Minh, and decolonization, opposing Bảo Đại's influence.3 The inaugural Constitution included provisions for establishing the republic and orchestrating the election of its president.3 As documented in LIED, only multiparty legislative elections were held until 1960. In the years 1961 and 1962, multiparty executive and legislative elections were conducted. Subsequently, multiparty executive and legislative elections were once again classified as absent in 1963. Based on our observations, multiparty executive and legislative elections were held during this period, which aligns with the observations of LIED. LIED declares the absence of competitiveness for the entire time. In addition, according to V-Dem’s CEI and EF&FI elections have not really been clean, free or fair. As outlined in the 1956 constitution, Diệm, serving as president, wielded a significant concentration of power, and his style of governance gradually veered towards authoritarianism.3 Therefore, LIED considers that political liberties were absent for this time. V-Dem’s PCLI affirms political liberties were not really given. Moreover, candidates for the national assembly could run as independents or under party affiliations. However, political parties needed authorization from the ministry of interior to attain legal status, which only allowed pro-government political parties and disqualified candidates with links to communism. Once elected, candidates clustered around blocs, such as the People’s Bloc, the Unification Bloc, and the Society Bloc, although they were never formalized (Hartmann 2001). Diệm did not control the army, faced administrative deficiencies, and held minimal authority over significant areas of the South controlled by powerful religious sects like the Hòa Hảo and Đạo Cao Đài. Moreover, fearing potential coups, Diệm prioritized personal loyalty in his officers and established fragmented military authority, with no single officer controlling all troops in any given region (Davidson 1991, Asselin 2013). According to Polity5, during this period, the executive encountered slight limitations on decision-making power imposed by other institutions. For the relevant regime period, V-Dem's JCE is interpreted by us as indicating that judicial constraints on the executive were limited, while V-Dem's LCE is classified by us as indicating that legislative constraints on the executive were robust.