Mircale on the Marne

The Battle of the Marne began today, 99 years ago. It resulted in an Allied victory against the German Army. The battle effectively ended the German offensive that had began the war and saw the British stop their headlong retreat from Mons.
The counterattack of six French armies and one British army along the Marne River forced the Germans to abandon their push on Paris and retreat.
There then began a series of outflanking manoeuvres towards the channel coast, and then the protagonists dug in, setting the stage for four years of trench warfare.
The battle of the Marne was an immense strategic victory for the Allies, wrecking Germany's bid for a quick victory over France and forcing it into a protracted two-front war which it ultimately could not sustain.