On the day and night of March 31, 1915, the Russians stormed and carried the Austrian positions 4,000 feet high up on the Poloniny range during a heavy snowstorm. So deep was the snow in places that movement was impossible; the trampling of the charging battalions rushing down over the slopes dislodged avalanches of snow, overwhelming both attackers and defenders. By April 1, 1915, the Russians approached Volosate, only twelve miles from the rear of the Uzsok Pass, from which they were now separated by a low ridge. Holding full possession of the Poloniny range farther west, they commanded the road from Dvernik to Vetlina. From the north other Russian columns captured Michova on the Smolnik-Cisna railroad, crossed the Carpathians, and penetrated into the Virava Valley. Occupying the entire loop of the Sanok-Homona railway north and south of Lupkow, and Mezo-Laborcz toward Dukla, the Russians now threatened the Austrian mountain positions between Lupkow and the Vetlina-Zboj road from the western flank as well. Violent winter storms raged across the Carpathians on April 2 and 3, 1915; nature spread a great white pall over the scenes of carnage. While the elements were battling, the weary human fighting machine rested and bound its wounds. But not for long. Scarcely had the last howls of the blizzard faded away when the machine was again set in motion. South of Dukla and Lupkow and north of Uzsok fighting was resumed with intense vigor. Painfully digging through the snowdrifts the Austrians retired from the Smolnik-Kalnica line, now no longer tenable. Storm hampered the pursuing enemy, who captured the Cisna railway station on April 4, 1915, with all its rolling stock and large stores of munitions. On April 6, 1915, a Russian communique announced that "during the period from March 20 to April 3, 1915, we took prisoners in the Carpathians, on the front from Baligrod to Uzsok, 378 officers, 11 doctors, and 33,155 men. We captured 17 guns and 101 machine guns. Of these captives 117 officers, 16,928 men, 8 guns, and 59 machine guns were taken on a front of fifteen versts (10 miles)." The Russians again advanced along their whole front on April 4, 1915; forcing their way along the Rostoki stream, they carried the village of Rostoki Gorne with the bayonet and penetrated the snow-bound Rostoki Pass. Their first line arrived at a Hungarian village called Orosz-Russka, five miles from Nagy Polena, at the foot of the pass. The Austrians attempted to drive them back, but they held their ground.