 Like Foch and most French leaders of his era (Clemenceau, who had lived in the US as a young man, was a rare exception), Weygand could not speak enough English to "sustain a conversation" (German, not English, was the most common second language in which French officers were qualified).Competent interpreters were therefore vital.Weygand drew up the memorandum for the meeting of Foch with the national commanders-in-chief (Haig, Pétain and John J. Pershing) on 24 July 1918, the only such meeting before the autumn, in which Foch urged (successfully) the liberation of the Marne salient captured by the Germans in May (this offensive would become the Second Battle of the Marne, for which Foch was promoted Marshal of France), along with further offensives by the British and by the Americans at St Mihiel.