 After changing his name to Weygand and receiving French nationality, he became an instructor at Saumur.During the Dreyfus affair, Weygand was one of the most anti-Dreyfusard officers of his regiment, supporting the widow of Colonel Hubert-Joseph Henry, who had committed suicide after the discovery of the falsification of the charges against Captain Dreyfus.Once promoted to captain, Weygand chose not to attempt the difficult preparation to the "École Supérieure de Guerre" (the French staff college) because of his desire, he said, to keep contact with the troops.