The Russian troops on the Lower Wisloka held their positions longest, but they also fell back about May 8, 1915, and for the next two days engaged the enemy near some villages southwest of Sanok. Here a strong force had collected, which not only offered a powerful resistance, but even attempted a counterattack against their pursuers. Over a front of 145 miles, extending from Szczucin near the Vistula north of Tarnow, down almost to the Uzsok Pass, a fierce battle progressed between May 8 and 10, 1915. In the region of Frysztak, where the Russian line was weakest, the main German offensive was developing its strongest attack. Reenforcements were on the way, but could not arrive in time. For the moment disaster was averted by an aggressive Russian counteroffensive halfway between Krosno and Sanok, from the Besko-Jacmierz front, by which move sufficient time was gained to enable the main forces to retreat. The Russian defense in the Vistok Valley collapsed on May 10, 1915; the German center had almost arrived within striking distance of the important railway line from Tarnow via Dembica and Rzeszow to Jaroslav north of Przemysl. At Sanok the battered remnants of the Russian troops who had escaped from the passes maintained themselves with the greatest difficulty. Heavy German artillery followed the Bavarians to Rymanow, five miles from the Russian line at Besko, and were now playing fiercely upon the positions west of Sanok. The Tenth Austro-Hungarian Army Corps as well as the Seventh were making their presence felt from the southwest against Odrzechova and from the south, whence Von Marwitz with the German Beskid Corps was rapidly advancing. To the southeast, Boehm-Ermolli was battering the Baligrod-Lutoviska front, almost in the same position he occupied at the end of January in the first attempt to relieve Przemysl. The battle was practically over by the night of May 10, 1915; the Russians could hold out no longer against the ever-increasing flood of Austrians and Germans pouring across every road and pathway against their doomed line. Blasted and scorched by artillery, machine-gun and rifle fire; standing against incessant bayonet and cavalry charges; harassed by the Austrians from the south, the Russians were indeed in sore straits. Yet they had fought well; in the losing game they were playing they were exhausting their enemies as well as themselves in men and munitions--factors which are bound to tell in a long, drawn-out war. Above all, they still remained an army: they had not yet found their Sedan. No alternative lay before them--or rather behind them--other than retreat to the next possible line of defense--toward Przemysl.