Meantime, the crown prince's army had been steadily victorious. The weak French army under General Sarrail had been pushed back, yielding only foot by foot, back, back, along the rugged hill country of the Meuse. A determined stand was made to protect the little fort of Troyon, ten miles south of Verdun, for had the Germans succeeded in taking this, Verdun would have been surrounded. No army and no generalship could have done more than the Third Army and General Sarrail did, but they could not hold their ground before Troyon. On September 7, 1914, the way to Troyon was open, and the army of the crown prince prepared to demolish it. Then came September 9, 1914, when the allied successes in the western part of the Marne valley allowed them to send reenforcements. Thus the Third Army was perceptibly strengthened and hope for Troyon grew. One day more, certainly two days more, and nothing could have saved Troyon, but with the whole German line in retreat, the army of the crown prince could not be left on the advance.
Incredible though it may seem, when the army of the crown prince besieging Troyon withdrew, that little fort was a mere heap of ruins. There were exactly forty-four men left in the fort and four serviceable guns. Even a small storming party could have carried it without the least trouble, and its natural strength could have been fortified in such wise as to make it a pivotal point from which to harry Verdun.
At the extreme east, on that ring of wooded heights known as the Grande Couronne de Nancy, and drawn up across the Gap of Nancy, the Second French Army, under General de Castelnau, successfully resisted the drive of the Crown Prince of Bavaria. Great hopes had been placed on this attack, and on September 7, 1914, the German Emperor had viewed the fight at Nancy from one of the neighboring heights. Surely a victory for the German arms might come either at the point where stood the German Emperor or where led the crown prince. But the fortunes of war decided otherwise. Far from losing at Nancy, the French took the offensive. After an artillery duel of terrific magnitude, they drove the Bavarian army from the forests of Champenous and took Amance. The line of the Meurthe was then found untenable by the Germans, and on September 12, 1914, General de Castelnau reoccupied the town of Lunéville, which had been in the hands of the Germans since August 22, 1914.