In order to counterattack the attack of Germans, the Allies started counteroffensive, also called the Hundred Days Offensive, it started on 8th of August. After its launching, on 1st day a gap twenty four kilometers long was created in the German’s lines. Germans reffed this day to as “Black Day of the German army”. After moving forward of twenty three kilometers, Germans resistance became strong, and the battle came to an end on 12th of August.Rather than continuing the Amiens battle past the point of initial success, the Allies moved their focus somewhere else. Allies leaders knew now that continuing an attack after resistance was increasing lives being wasted, and better option is to change a line than to try to cross it over. They started to take attacks in quick sets to take advantage of successful advancement on the sides, then attacked them back when their each attack lost its initial force. In the last week of August the Allied pressure, along a hundred kilometer front, against the Germans was strong and unbelievable. Faced with these progresses, on 2nd September the German Supreme Army Command ordered to withdrew from Hindenburg Line in the south. In September the Allies advanced to the Hindenburg Line in the north and center. The Germans continued to fight strong and launched many attacks on obscured positions. Then an attack by the Britain and French came within three kilometers of St. Quentin.In almost 4 weeks of fighting and attacking, over 100k Germans prisoner were taken. On 13th of August, Germany discussed that the war could not end militarily and, on the next day, the German Crown Council stated that victory was now very unlikely.The final assault on the Hindenburg Line began with the Meuse-Argonne Offensive, on 26th of September. After signing of truce by Bulgaria seprately, on 29th of September. It was now visible that Germany can no longer place a proper defense. With the military declining in terms of number, and widespread lossage of confidence, Germany moved towards surrender. Negotiations started immediately with President Wilson. Demanded of Wilson were a constitutional monarchy and parliamentary control over the German army. The Kaiser, kings and other rulers all were removed from power. Imperial Germany was dead, a new Germany had been born as the Weimar Republic.