The German offensive began on December 12, 1917, but was far from being as formidable as the British feared. The first attack was made at dawn against an elbow in the bend of the British line between Bullecourt and Queant, about ten miles west of Cambrai. The Germans were in strong force, the troops, principally from Bavaria, advancing in waves and close formation, and by sheer weight of numbers won about 500 yards of front-line trenches before they could be checked. Other attacks were made from the east, and the third south of Riencourt, both of which were shattered by British rifle and machine-gun fire. The Germans were evidently trying to discover weak spots in the British lines by a process of testing, for on December 14, 1917, they made an assault on the Ypres front in Flanders. The stroke was delivered on a front of about 300 yards southeast of Polygon Wood, against British positions near Polderhoek Château. They won a section of front-line trench, but were repulsed at all other points of attack. East of Bullecourt, in the Cambrai area, German gunfire had increased in violence. During the night the British engaged in bomb fighting that was highly successful, and enabled them to improve their lines. North of Bullecourt in the afternoon of December 15, 1917, the British carried out a successful raid in which a number of prisoners were captured and enemy dugouts and defenses were destroyed. Snow began to fall during the night on this date, and by morning the countryside was deeply covered, and the ugly scars of battle hidden from sight. The snow lay in heavy drifts on the roads and fields. No military operation was possible, and even the sinister-looking guns were silent. This white truce was appreciated by the British as it must have been by the soldiers of the kaiser, for both armies had been under a severe strain since General Byng's advance on Cambrai, November 20, 1917. It was estimated by conservative military observers that the German strength on the Franco-British front at this time was 154 divisions, one less than the great force amassed here in the previous July, when the German military effort against France was at its maximum. During these momentous days on the British battle front the French had been nibbling away at the German positions around Verdun and along the Aisne and Meuse Rivers. The capture of the entire line of lights through which runs the famous Chemin-des-Dames had given them command of the strongest positions in that region. The Germans, forced to retire across the Ailette and to abandon the whole valley to the French, were so situated that it would be taking a gambler's chance to attempt an offensive on a large scale. Nor was a direct attack on Verdun probable, for they had lost all their gains on both sides of the Meuse, while every point of vantage in this sector was in possession of the soldiers of the Republic.