[1] As Louis Bouët recalled in L'école émancipée, after the Congress of Chambéry in 1912, the teachers' union was in turmoil and was being repressed by the authorities.

At the Congress of Bourges in 1913 Émile Glay, who had called on Pierre Laval for help as counsel for the Federation, said to André Léon Chalopin that nobody would be left in the Seine since their licence to teach would be revoked.

"[2] During World War I (July 1914 – November 1918) Loriot was caught up in the wave of patriotic socialists who joined the union sacrée, pledging to co-operate with the government.

He devoted much effort to fighting the nationalist unions that supported the war, along with Alphonse Merrheim, Albert Bourderon and Raymond Péricat.

[2] In February 1917, the Committee for the Resumption of International Relations split, with Jean Raffin-Dugens, Bourderon and Pierre Brizon joining the SFIO minority, led by Jean Longuet, and Loriot and fellow socialists Charles Rappoport, Louise Saumoneau and François Mayoux took control of the committee.

At the Tours Congress in December 1920 he was appointed a member of the Executive Committee of the newly-formed Communist Party and the international secretary.