On March 24, 1915, the battle was in full progress: "Especially severe is the fighting for the crest of the mountain south of Jasliska and to the west of the Lupkow Pass. The forests which cover these mountains offer special facilities for the construction of strong fortifications." March 25: "The woods in the Lupkow region are a perfect entanglement of barbed wire... surrounded by several layers of trenches, strengthened by deep ditches and palisades. On this day our troops carried by assault a very important Austrian position on the great crest of the Beskid Mountains." The Russian captures for the day amounted to 100 officers, 5,600 men, and a number of machine guns. Advancing from Jasliska the Russians seriously threatened the Austro-German position in the Laborcza Valley, to which strong reenforcements were sent on March 25. With terrific violence the battle raged till far into the night of the 27th, the Russians forcing their way to within seven miles of the Hungarian frontier.
In eight days they had taken nearly 10,000 prisoners. By the night of March 28, 1915, the entire line of sixty miles from Dukla to Uzsok was ablaze--the storm was spreading eastward. Like huge ant hills the mountains swarmed with gray and bluish specks--each a human being--some to the waist in snow, stabbing and hacking at each other ferociously with bayonet, sword, or lance, others pouring deadly fire from rifle, revolver, machine gun, and heavy artillery. Over rocks slippery with blood, through cruel barbed-wire entanglements and into crowded trenches the human masses dash and scramble. Here, with heavy toll, they advanced; there, and with costlier sacrifice, they were driven back. Fiery Magyars, mechanical Teutons and stolid muzhiks mixed together in an indescribable hellbroth of combative fury and destructive passion. Screaming shells and spattered shrapnel rent the rocks and tore men in pieces by the thousand. Round the Lupkow Pass the Russians steadily carved their way forward, and at the close of the day, March 29, 1915, they had taken 76 officers, 5,384 men, 1 trench mortar, and 21 machine guns. Along the Baligrod-Cisna road the fighting proceeded, up to March 30, by day and night.