Battle of the Chemin des Dames (Nivelle Offensive)

The Chemin des Dames offensive, directed by General Nivelle, was conceived as a decisive breakthrough on the Western Front. Planned as a brief, massive shock that would break German lines in 48 hours, the attack met fierce resistance. Despite massive artillery deployment and weeks of preparation, French forces failed to break through durably, bogged down in violent counter-attacks, well-fortified trenches, and terrain transformed into a quagmire.

After repeated failures in 1916 and general exhaustion, French headquarters relied on a large-scale surprise offensive. Nivelle promised rapid victory, leading authorities to support the operation despite warnings. But the Germans, informed by intelligence services, reinforced their positions. Failure brought serious command crisis and mutinies in the French army in spring 1917.

The attack relied on 10 days of artillery preparation followed by infantry assault in waves. But depth of German positions, concrete shelters, precise counter-fire, and machine-gunned lines made advance impossible. Topography (steep plateau) prevented any manoeuvre. Despite use of Schneider light tanks and elite units, losses were massive.

Failure of the offensive provoked moral collapse in the French army. Mutinies broke out in several units, obliging disciplinary measures and reorganization. General Pétain replaced Nivelle at command in May. French offensive doctrine was abandoned in favour of defensive strategy and gradual restoration of troop morale. Politically, confidence in military leaders was severely shaken.