French troops, supported by Americans (as well as British and Italian contingents), are counterattacking on the Marne. The Germans have been forced to abandon their own Marne-Champagne offensive and are now being pushed backwards, forced to gradually yield some of the gains of their earlier Blücher-Yorck battle. The French have now crossed the Marne and are continuing to move forward, though their advance has slowed somewhat thanks to their own exhaustion and the broken nature of the ground.
The Germans appear to be suffering something of a morale crisis. The spring offensives, starting with Operation Michael in March, were meant to bring victory but instead they have led to ever-lengthening casualty lists. With the Allies now striking back the promises of victory seem hollow. The crisis in morale manifests in incidents of units surrendering to the Allies and in disorder behind the lines. Nevertheless, most German units are continuing to resist the Allied advance; for the French this is no victory parade.
The failure of his Marne-Champagne offensive and the successful French counterattack has shaken Ludendorff, Germany’s Quartermaster-General and effective dictator. However he is still hoping that one more German offensive will bring about the final defeat of the Allies. For some time now he has been planning an offensive in Flanders, codenamed Hagen, which is meant to drive the British into the sea and force the French to surrender. His southern offensives (Blücher-Yorck, Gneisenau and the Friedensturm) were meant to be diversionary preludes to the final battle in Flanders. Now his attention turns back to the north and the war-winning offensive he intends to launch there. But with his army broken and the Allies in the ascendant, Ludendorff’s dreams of victory now look delusional.
French machine-gunnners in a ruined church (Wikipedia: Bataille de la Marne (1918))
US propaganda poster showing African American troops of the US 369th infantry regiment (Wikipedia: 369th Infantry Regiment)