The U.S. State Department Central Files are the definitive source of American diplomatic reporting on political, military, social, and economic developments throughout the world in the 20th century. Concentrating exclusively on those Central Files that have not been microfilmed by the National Archives or other publishers, UPA's microfilm editions of the Central Files nonetheless dwarf the State Department's very selective volumes of the Foreign Relations of the United States (FRUS). Containing less than one percent of the material in the Central Files, FRUS focuses on U.S. relations with individual countries but does not include coverage of many of the key topics to which the majority of the original files are devoted. Each part of the Central Files contains a wide range of materials from U.S. diplomats in foreign countries: special reports on political and military affairs; studies and statistics on socioeconomic matters; interviews and minutes of meetings with foreign government officials; court proceedings and other legal documents; full texts of important letters, instructions, and cables sent and received by U.S. diplomatic personnel; voluminous reports and translations from foreign journals and newspapers; and countless translations of high-level foreign government documents. These complete and unedited files provide researchers with previously unpublished data and analyses regarding the eventful Per6nist era of Argentine politics. The Central Files trace the manner in which Juan Domingo Per6n molded the working class into a powerful political constituency and consolidated his influence over the legislature, the judiciary, the unions, the universities, and the press. They also document the increasing hostility of the church, the students, and the officers corps toward Per6n that resulted in his overthrow in September 1955. In addition, Argentina's economic, social, and foreign affairs during this important postwar period are examined in great detail.