Final answer:
The first major battle of World War 1 was the Battle of the Marne, which took place in 1914. It was a significant turning point in the war as the Allies were able to stop the German advance.
Step-by-step explanation:
The first major battle of World War 1 was the Battle of the Marne, which took place from September 6-12, 1914.
This battle occurred near the Marne River in France, and it was a crucial turning point in the war.
The Allied forces were able to successfully halt the German advance and push them back, preventing their capture of Paris.
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