In the early stages of the battle a new French commander was appointed, whose catchphrase was 'Ils ne passeront pas'. Who was this general?

In 1916 the war of attrition continued on the Western Front with several battles taking place. The Germans tried to dislodge the French from the fortress complex of Verdun, while the British tried to assist the embattled French by launching a massive frontal attack further west along the River Somme.