On the morning of July 13, 1915, soon after sunrise, a tremendous cannonade was let loose from guns of all calibers. Although the weather was rainy and not well fitted for observation the German guns seem to have found their marks with great accuracy. When the German infantry stormed the first line of works which had been shattered by the artillery fire they met with comparatively little resistance and their losses were small. The bombardment apparently had done its work thoroughly. The German infantry rushes were started in successive intervals of a quarter of an hour, line following line. Swarms of unarmed Russians could be seen coming out of the trenches seeking to save themselves from the terrible effect of the shell fire by surrendering. During the course of the forenoon the sun came out and illuminated a scene of terrific destruction. The Russian positions on the heights northwest of Przasnysz had been completely leveled. In their impetuous forward rush the German troops did not give the enemy time to make a stand in his second line of trenches and overrunning this, by night began to enter the third Russian defensive line. Przasnysz was flanked in the course of twenty-four hours and could no longer be held. A fine rain was falling as the German columns marched through the deserted, smoke-blackened city, a melancholy setting for a victory. On July 14, 1915, the German troops had broken through on both sides of the city, met to the south of it and forming a mighty battering ram, on the next day, forced the next Russian line, the last, to the north of the Narew. This ran through Wysogrod-Ciechanow-Zielona to Kranosiele. The Russians here made a desperate defense and the German advance pushed forward but slowly. The effect of the German artillery fire seems not to have been as striking as on the first day of battle. The German report of the attack on this line points out that the regiment of the Guard holding the right wing of a division which was to attack the heights to the south and southeast of Zielona was impatient to go forward, and was allowed to advance before the reserves which were to be held in readiness to support the move had come up. However, confident of the accuracy with which the "black brothers" (shells from the big guns) struck the enemy's trenches, the riflemen leapt forward through fields of grain as soon as they saw that a gust of their shells had struck in front of them. By means of signs which been agreed upon they then signaled their new positions and the guns laid their fire another hundred meters farther forward. The infantrymen then stormed ahead into the newly made shell craters. Thus they went forward again and again. Neither Russian fire nor the double barbed wire entanglements were able to check their assaults.