The daring stroke of throwing our army against the Meuse-Argonne line straight at the enemy's communications had already had its reward; although the Germans had been warned of the attack, they had no idea that it would be in such force. They recognized at once that the threat against the Lille-Metz railroad was serious. They must bring up good divisions and enough of them, and sufficient artillery, to make sure that it was arrested. Our task, now, was the thankless one of continuing to draw more and more divisions against us in the consciousness that every German whom we held or whom we killed or wounded was one more removed from the British or French fronts. We were to have the stiffest fighting of any part of the line, and the value in what we did was not to be reckoned in ground gained, but in damage done the enemy. During the following days we continued to advance while the Germans settled down in strength in front of us and established themselves in the strong trench line of the Kriemhilde Stellung across a series of commanding heights. Our divisions, exhausted after a week or more of fighting, had to be relieved by rested divisions which were called to the front including the 3d and the 5th and 1st Divisions of Regulars. We had to weaken our line a little owing to the necessities of transport. The embargo on building roads before the attack, and our inability to bring up engineering material, and our lack of labor and sufficient experience in handling traffic, which can only be learned in battle, led to inevitable congestion. The area of shell craters, extending for half a mile or more as well as across no-man's-land, which consisted simply of earth pulverized by four years of shell fire, seemed to have no bottom to the engineers who worked night and day in order to make the passage of the artillery and the heavy motor trucks possible. In the dripping rain and penetrating cold, taking what sleep they might steal in wet clothes, all hands kept ceaselessly at their task while the men in the front line were digging "fox holes" in the seeping slopes of hills among the roots of trees of gassed woods and in ravines. The issue was joined in stubborn and bitter fighting in which it was the American plan always to keep the initiative and the upper hand over the enemy and to force him to put in more and more of his decreasing reserves.