On August 3rd, 1914 the Germans had declared war on France, thanks to Belgium if they were able to hold back the troops back long enough for the English to be able to get to the cost and start to help out France. The German troops were starting to get close to the capital causing panic in pairs. Most of the government had left the capital, and the military was in shambles as the previous battles. The fact is that Germans were much more advanced in military affairs than the French causing massive casualties. In a week, they had lost 300,000 men and in a day 27,000 men! Some of the most ridiculous numbers in this war and probably in history! Due to this the Germans were in advantage and had been able to advance.
The Germans were 5o km away from Paris and getting ready to attack, but they were weaker than before. On August first, when Germany had declared war on Russia, there was support from the Austrian- Hungarian empire, but the battle was not going their way on the eastern front. What ended up happening was that the Germans had to send back troops to support the eastern front. This gave a small advantage to France as the Germans were now weaker. The civilians knew that they needed to do something to stall the Germans until the English could have come to give them suppose, so they used taxi cabs. Over 600 taxi cabs got in line 50 km from the city on the battlefield and caused some defense for the French creating enough time for the English to come and suppose the French. On the night of the 8th of September, the French and English were able to outflank the German troops, and on the 9th of September, they retreated to north of the Aisne River digging creating trenches. From September 6–12, 1914 the great battle of the mars happened right outside of France. Even though the Germans are still not entirely out of the country, this was a victory for the French.
References:
https://www.britannica.com/event/First-Battle-of-the-Marne
http://www.historyplace.com/worldhistory/firstworldwar/index-1914.html