August 10, 1918, was a notable day for the French forces when Marshal Foch threw his First Army against the apex of the German salient southeast of Amiens. Montdidier was captured, and the salient was smashed in to an average depth of six miles on a thirteen-mile front, reaching a line extending from Andechy to the northeast of Montdidier to Elincourt, ten miles to the southeast. From Albert to the southern side of the Montdidier salient the whole Allied line was pushed eastward, reaching a maximum distance in the direction of Chaulnes, the principal railroad center of the Germans west of the Somme River. The French launched their attack without any artillery preparation in the sector east of Montdidier between Courcelles-Epayelles and the Matz River. The Germans were on the alert, but the dash and suddenness of the French attack overcame their most determined efforts. In one hour after the French went forward their first objective, Ressons-sur-Matz, was won, and in the succeeding two hours they had captured Mortemer, Cuvilly, and Marqueglise. At some points the advance was five miles. By noon on August 10, 1918, the Germans in Montdidier found that they had been caught in the jaws of a trap. Converging French attacks from the north and south had succeeded in practically encircling the town. The French drive had also deprived the Germans from using the Montdidier-Chaulnes railway, which was the only line that supplied food and material to their fighting front at the bottom of the Montdidier pocket. By the capture of Faverolles, which was stormed by the French in the morning of August 10, 1918, the Germans were hampered in their withdrawal of troops from Montdidier. The day closed with Von Hutier's forces in hurried retreat from the Montdidier-Noyon line. The Allies had made their great advance with only moderate losses. The casualties, including killed, wounded, and missing, numbered less than 6,000, or not more than a fourth of the number of prisoners taken. In the course of the fighting eleven German divisions had been defeated and so badly cut up that a long time must elapse before they would be in a condition to be re-formed and ready for serious work. North of the Ancre River the British had firmly established their positions and were pushing out patrols in the direction of Bray. In their advance south of the Somme they captured Warvillers, Vrely, Folies, Rozières, and Vauvillers. To the north of the Somme, where they were aided by the brilliant fighting of the Americans, Chipilly Spur was the scene of a determined struggle. After winning the Spur the Allies pressed on, driving the Germans before them. An interesting feature of the day's advance was the capture at Lihons of a complete German divisional headquarters and staff.