Parti ouvrier français
In 1902, Jules Guesde's French Workers' Party (POF) merged with others socialist parties to form the Socialist Party of France ("Parti socialiste de France", PSF), and finally merged in 1905 with Jean Jaurès' "Parti socialiste français" to form the French Section of the Workers' International (SFIO). Marcel Cachin, who would lead the split in 1920 which led to the creation of the French Communist Party (first SFIC, then PCF) and edited "L'Humanité" newspaper, became a member of the POF in 1891.