 Complete the following phrase:  Six months later, he was arrested and expelled from the German Empire for maintaining close contacts with the Russian revolutionaries there. He finished his education in 18941896 in Zürich, Nancy and Montpellier, where he wrote for La Jeunesse Socialiste and La Petite République, maintaining a friendship with Guesde and becoming an opponent of Jean Jaurès reformist views. According to his own testimony, he became active in supporting the 