The Germans never reached Paris in world war 1. The Meuse–Argonne offensive was the last Allied offensive of world war 1 and it resulted in the German retreat. It was fought for 47 days up until the Armistice of November 11, 1918, and the end of the war. In that offensive Americans lost around 190 000 people.
Paris was not spared by the war since the Germans had the Paris Gun that could fire shells on the city. But troops never came to Paris during the war.
