BATTLE OF KOZIOWA--OPERATIONS IN THE BUKOWINA Owing to the topographical conditions under which fighting must be carried on in the central Carpathians, some weeks might be expected to elapse before a general engagement developed along the entire front. Lateral communication or cooperation between the advancing columns was out of the question; the passes were like so many parallel tunnels, each of which must first be negotiated before a reunion can take place at the northern exits. We will follow the achievements of the three groups in separate order. Army A, under Boehm-Ermolli, crossed Uzsok and Rostoki, and forced part of the Russian line back upon Baligrod, but Brussilov held it fast on Dukla and Lupkow, strongly supported by Dmitrieff on his right. Here the attack failed with severe losses; the Germanic forces were thrown back into Hungary, and the Russians commanded the southern ends of the passes around Dukla. The Uzsok Pass was of small strategical value to the Austrians now that they had it. It is extremely vulnerable at every point; steep, narrow, and winding roads traverse its course nearly 3,000 feet high, with thickly wooded mountains up to 4,500 feet overlooking the scene from a close circle. Regarded merely as a short cut to Przemysl and Lemberg, the Uzsok was a useful possession provided always that the northern debouchment could be cleared and an exit forced. But the Russians held these debouchments with a firm grip, and the pass was consequently of no use to the Austrians. About February 7, 1915, the Russians attempted to outflank the Austrian position in the Lupkow Pass from the eastern branch of the Dukla by pushing forward in the direction of Mezo-Laborc on the Hungarian side. The movement partially succeeded; they took over 10,000 prisoners, but failed to dislodge the Austrians from the heights east of the pass. Severe fighting raged round this district for over a month, the Russians finally capturing Lupkow, as well as Smolnik at the southern exit of Rostoki. Had the Russians succeeded in getting between Uzsok and the Austrian line of communication, as was undoubtedly their aim, the Austrians would have been compelled to relinquish the pass without even a fight. However, General Boehm-Ermolli's mission proved a failure.