In the course of the day the French, British, and American troops, pressing hard on the heels of the German rear guards, had reached the line of Bruyères, Villeneuve-sur-Fère, and Courment, all within a few miles of the great German supply center of Fère-en-Tardenois, which was now so hemmed in that its evacuation must soon follow. The advance of the Allies in a northeasterly direction from Château-Thierry had now reached ten miles. Since the beginning of the counteroffensive 30,000 German prisoners were taken. The Allies continued their triumphant progress on July 28, 1918. The Germans in the Soissons-Rheims salient were forced to accelerate the speed of their retirement northward, closely followed by tanks, cavalry, and infantry patrols of the Allies. French cavalry, supported by some infantry elements, had, reached in the morning of July 28, 1918, the district south of Villers-sur-Fère, a little over a mile from Fère-en-Tardenois and Sergy. The success of the Allies along the whole front was now complete and about half of the pocket in which the enemy had been cornered was retaken. The Germans were retiring as swiftly as they could, but their losses were tremendous, as French and American troops harried them on the center, and French and British were dealing hammer blows on both of their flanks. While the cavalry were hard at it, the tanks had pushed their way in among the retreating forces, where they did effective work. The Allies' aviators meanwhile, flying a few hundred feet overhead, were machine-gunning columns on the march and bombarding German batteries. In the Soissons area the Germans had massed a large number of heavy guns on the heights around Juvigny and Chavigny, and from these points they bombarded the western wing as far south as Oulchy-le-Château. Yet the Allies in the Oulchy region continued to make progress, though facing some of the finest German divisions, and the concentrated fire of a vast number of machine guns. On the eastern wing the Allies were gradually gaining control of the whole road leading from Dormans to Rheims. The Germans had assembled on this side a strong array of artillery near St. Thierry, which served to protect their left flank, and which delayed, though it could not stop, the Allies' advance.