In 1920 , during the Tours Congress , the majority and left wing of the party broke away and formed the French Section of the Communist International ( Section franÃ aise de l'Internationale Communiste or SFIC ) . This party joined the Third International , that was founded by Lenin . In 1920 , during the Tours Congress , the majority and left wing of the party broke away and formed the French Section of the Communist International to join the Third International founded by Vladimir Lenin .