Now, by studying the map, it will be seen at a glance that it was only the Tzer Mountains which separated the Austrian column crossing the Drina at Losnitza and the column which had crossed the Save and had occupied Shabatz. Should the Austrians from over the Drina get possession of the Tzer ridges, they would thus effect a junction with the forces in Shabatz, and so form a line that would cut off a large portion of northwestern Serbia. Aside from that, they would have a solid front. But should the Serbians possess themselves of the Tzer ridges first, then they would have driven a wedge in between their two main forces. This would make it difficult for either to advance, for then they would be exposing a flank to the enemy, who would also have a great advantage in position. Moreover, the Serbians would be in a position to turn immediately toward either of the Austrians' columns, whichever might need most attention. Meanwhile, the Serbian cavalry had made a reconnaissance toward Shabatz. They immediately sent back reports of overwhelming forces occupying the town. It was out of the question to make any attack there for the present. It was now learned, for the first time, that another of the enemy's columns had crossed the Drina far down in the south, and was marching on Krupanie, just below the Guchevo Mountains and on the way to the upper part of the Jadar Valley. However, as the first report seemed to indicate that this was only a minor force, a small force of third reserve men was detached to hold this force back and prevent its entrance into the main field of operations. During the day and night of August 15,1914, the two opposing forces were moving into position for battle: setting the pawns for the game of strategy that was to be played. The Austrians at Losnitza were advancing up the mountain slopes and took possession of the Tzer and Iverak ridges, straddling the Leshnitza Valley. Up in Shabatz, Austrian troops were pouring across the pontoon bridges. A flanking column, coming from the Drina, had arrived at Slepehevitch. Another force was stationed with its left and center on Krupani, its right spread out into the mountains north of Liubovia. On the Serbian side the right wing of the Second Army, screened by the cavalry division, were preparing to cut off the Austrian forces in the north from their juncture with those advancing along the Tzer ridges; the center and left was marching on the enemy on the Iverak ridges, in conjunction with the right of the Third Army, then north of Jarebitze. The center of the Third held the positions south of Jarebitze, while its left, split into small detachments, had been directed to oppose the invasion toward Krupanie and the advance from Liubovia.