Before proceeding with the progress of Von Mackensen and his mighty "phalanx," let us briefly trace the progress of Von Linsingen, whom we left on the road to Stryj and the Dniester, or rather, attempting to force that road. While the forts of Przemysl were being smashed in the north, Von Linsingen was pounding and demolishing the Russian positions between Uliczna and Bolechov. Heavy mortars and howitzers were at the same time being placed into position in front of the Russian trenches between Holobutow and Stryj. On May 31, 1915, they began to roar, and before long the trenches were completely pulverized--the very trenches that thousands of Germans and Austrians had died in in vain attempts to carry by assault. The Thirty-eighth Hungarian Honved Division were sent to finish the work of clearance and take possession of Stryj. The entire Russian line withdrew to the Dniester, step by step, ever fighting their favorite rear guard actions, killing and capturing thousands of their enemies. They retired behind the Dniester, but maintained their hold on any useful strategical position south of the river, so far as was possible without imperiling the continuity of their line. We must also consider two more Austro-German sectors in order to bring the combatants stationed there into line with the Germanic advance--the Uzsok Pass and the Bukowina-_cum_-Eastern Galicia sectors. In the former the army of Von Szurmay stood beside that of Von Linsingen opposite the Ninth Russian Army. Von Szurmay led his men out of the pass and advanced northward on May 12, after the fall of Sanok had forced the Russians away from their positions in the vicinity of it. Their line of retreat was threatened by the Austrian approach to Sambor. On May 16, 1915, Von Szurmay moved across the upper Stryj near Turka and passed along secondary roads in the direction of the oil districts of Schodnica, Drohobycz and Boryslav, arriving on May 16-17, 1915. Von Linsingen's troops had started their advance on the same day as those of Von Szurmay, when the Russians round Koziowa had to retire for the purpose of keeping in touch with their line: the same pressure that Sambor exerted on the Uzsok. Here again the Russians adopted rear-guard tactics and considerable fighting occurred during their retreat to Stryj and Bolechow, both of which were eventually captured by Von Linsingen.