After the successful operations of the 7th of August, the French Ie Army continued its offensive in Alsace and quickly captured Mulhouse on the 8th of August. The industrial city was easily taken and Paris celebrated General Bonneau‘s victory. The French forces were then able to establish their front-line between Thann and Mulhouse.
However, if not a single German soldier could be sighted in the city, they did not left their positions without gathering a lot of intelligence of the French Ie Army. In the evening of the same day, General Curé received word that a massive German force was in movement in the nearby cities and forests. The General understood that the French soldiers were inferior in numbers, the city had to be evacuated, less than 24 hours after being taken. A strategic retreat in the surroundings was organized, ready to face the German forces on the 9th.