sentences:  He then became Commander-in-Chief of the entire French army, replacing General Nivelle, whose Chemin des Dames offensive failed in April 1917, thereby provoking widespread mutinies in the French Army.They involved, to various degrees, nearly half of the French infantry divisions stationed on the Western Front.Pétain restored morale by talking to the men, promising no more suicidal attacks, providing rest for exhausted units, home furloughs, and moderate discipline.