The International Communist League (Fourth Internationalist), earlier known as the International Spartacist tendency is a Trotskyist international. Its largest constituent party is the Spartacist League (US). There are smaller sections of the ICL (FI) in Mexico, Canada, France, Germany, Ireland, Italy, Japan, South Africa, Australia, Greece, Poland and the United Kingdom. The group originated within the Revolutionary Tendency of the Socialist Workers Party and, upon its expulsion from the SWP, it named itself Spartacist in 1964 in homage to the original Spartacist League in World War I Germany, co-led by Rosa Luxemburg and Karl Liebknecht. The central theoretical journal of the ICL(FI) is Spartacist which is published in four languages approximately once a year. Apart from the above the ICL(FI)s American section, the Spartacist League, operates the Prometheus Research Library in New York City. The library has published a number of bulletins and books and houses the tendencys archives and other material on the history of Trotskyism.