This young man was the son of a former German ambassador in London, and up to a short time before the outbreak of war was a Rhodes scholar[200] at Oxford. * * * * * So the raid into Alsace ended. The French had gained nothing, but they had not fought in vain. They now knew that Alsace was not strongly held by the Germans, and they had proved that their artillery was far better than that of the enemy. They had shown, too, that the French infantry was just as gallant and dashing as it had been in the brave days of old, and they had encouraged the Alsatians to expect that the yoke of the tyrants would soon be broken. On the day that the French retired from Mulhouse, General Joffre decided that the raid should be followed by an invasion. The forces brought together for this purpose were commanded by General Pau, an old soldier who had fought in the war of 1870-71. Like Nelson, he had lost an arm. He was considered one of the best of French commanders. The French advanced to the north of their former route, and carried all before them. On 19th August they again attacked Mulhouse. There was a good deal of fierce fighting, but the Germans were driven out of the town, and no fewer than twenty-four of their guns were captured. On 20th August Mulhouse was in the hands of the French once more. Then they marched south to Altkirch, and the Germans, who were afraid of being cut off from the bridges of the Rhine, retreated before them. The French seized the heads of the bridges on the left bank of the river, and then began to move northward along the plain towards the fortress of Colmar, which protects the main crossing of the Rhine. All the time more and more French troops were swarming across the passes of the Vosges, and were threatening to cut off the Germans from Strassburg. Things were looking extremely well for the French. It seemed that before long they would be in front of Strassburg and Metz. All this time, however, the Germans were bringing up an overwhelming number of troops, and on 20th August they began their counter-attack. It was at once successful; the French were driven back, and the Germans claimed to have captured 10,000 prisoners and fifty guns. On the Belgian border, as we shall learn in the following pages, the Germans were also winning victories, and France needed all her troops to defend her own soil. By the 25th of August the French had left Alsace. The invasion was over. It had failed. [Illustration: The Fight at Mulhouse on August 9, 1914, during the French Raid into Alsace.]