In the periods before and after World War II the political history of the Greek Democritus League was the prime agency for the Greek communist activity in Melbourne. This article explores the League’s relationships and ties with the International, Australian and Greek communist movements and discusses the major events which impacted upon its development. In particular, the article aims to show that the Democritus was an integral part of the communist movement. Allies and opponents are discussed in the framework of political events in Australia and Greece. While an Australian-based organisation, the Greek-led Democritus League was significantly influenced by events in Greece, such as the Greek Civil War, which by the end of 1949 had transformed the ‘workers’ club into the unofficial spokes-group for the Greek Communist Party and its interests in Australia.