 In 1918 Weygand served on the armistice negotiations, and it was Weygand who read out the armistice conditions to the Germans at Compiègne, in the railway carriage.He can be spotted in photographs of the armistice delegates, and also standing behind Foch's shoulder at Pétain's investiture as Marshal of France at the end of 1918.During the Polish–Soviet War, Weygand was a member of the Interallied Mission to Poland of July and August 1920, supporting the infant Second Polish Republic against Soviet Russia.