Kordatos was a member of the Central Committee of the
Socialist Labour Party of Greece (SEKE), and for a short period of time in 1922 as the party's general secretary as well as the editor of the party newspaper
Rizospastis. In 1922, along with other leaders of the party and the General Confederation of Greek Workers, he was arrested twice for anti-war newspaper articles and anti-monarchist activities. In 1924, Kordatos, along with Thomas Apostolidis and Seraphim Maximus, entered the so-called "Central Committee of three people", which led the party until the III Extraordinary Congress in November and December. The Socialist Labour Party of Greece-Communist renamed the
Communist Party of Greece (KKE) the same year. At the end of 1940, he was arrested by the regime of Metaxas in the early days of the
Greco-Italian War. During the occupation, he took part in the Resistance Movement in the ranks of the
National Liberation Front (EAM). After
World War II, he became a member of the General Council of the
United Democratic Left (EDA). Although his disagreements with the KKE softened during the anti-fascist struggle of the war years, their relationship was never fully restored. == Later life ==