Why was the outcome of the first battle of the marne so important to the outcome of war

 On September 9, the exhausted Germans began a fighting retreat to the Aisne River. The Battle of the Marne was the first significant Allied victory of World War I, saving Paris and thwarting Germany's plan for a quick victory over France.

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On september 9th the exhauseted germans began a fighting retreat to the aisne river. The Battle of marne was the first significant allied victory of world war 1  saving paris and thwarting germany's plan for a quick victory over France

So it bassicaly it didnt Secure Germany's plan of a quick victory over france

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