Armand later collaborated in other anarchist and pacifist journals such as "La Misère", "L'Universel" and "Le Cri de révolte". In 1901, he established with Marie Kugel (his companion until 1906) the journal "L'Ère nouvelle", which initially adhered to Christian anarchism, later embraced anarcho-communism and in 1911 finally adhered to individualist anarchism. He founded "Ligue antimilitariste" in 1902 with Albert Libertad and George Mathias Paraf-Javal, another intransigent individualist. These principles he sought to apply within the social experimental spaces, events and communes that anarchist groups in the France of the time called "milieux libres".