In the morning of August 7, 1918, Field Marshal Haig delivered a heavy blow at the armies of Prince Rupprecht of Bavaria on the southern side of the Lys salient. The British attack was launched on the front of about five miles, advancing their whole line to a depth of a thousand yards. To the south on the front east of Amiens on the Bray-Corbie road British troops recaptured positions which the Germans had occupied on the previous day. Along the Vesle between Braisne and Fismes, where French and American troops held the highway which runs parallel with the river, the Germans made furious counterattacks, but failed to dislodge the Allies. Nor were they able to hinder more than temporarily the French and Americans from crossing the river on hastily constructed bridges which their engineers had thrown over the stream protected by a heavy barrage. At daybreak, August 8, 1918, Field Marshal Haig attacked the German lines from near Albert south to Braches, on the Avre above Montdidier, with forces that included not only British, French, and Australian troops but also Canadians who had been brought up suddenly from the vicinity of Lens. The enemy, taken by surprise, were thrust back along almost the entire front of twenty-five miles, and this resulted in the capture by the Allies of over a hundred guns and more than 10,000 prisoners. The advance was between four and five miles, and at one point seven miles. The British launched their attack in a mist, after only a few minutes of artillery preparation, and the Germans were overwhelmed in the first onrush. The British won their objectives with only nominal losses. Of an entire army corps only two officers and fifteen men of the ranks were reported as casualties. The heavy mist in the early morning when the Allies advanced favored their plans, for not until 8 o'clock did a German aeroplane appear over the line and by that time the Allies had already made important progress. In the advance, tanks and armored cars accomplished wonders, striking dismay in the ranks of the enemy as they plunged through the mists, spouting fire and destruction, sweeping on heedless of obstacles and of the concentrated attack of German guns. By noon the Germans were making desperate efforts to escape with their transports. The quick and complete victory of the Allies on this day, August 8, 1918, proved that Foch's counteroffensive had turned the scale in their favor. From this time on, the Allies attacked and the Germans retreated. [Illustration: Advance of the Allies on the Amiens Front, August 8, 1918.]