The great attacks of the Germans on the troops defending Warsaw were being hampered to some extent by the laying waste of the country by the retiring Russians. Difficulty in moving heavy artillery on roads had also interfered with their progress, but on the morning of July 28, 1915, Von Woyrsch crossed to the eastern shore of the Vistula between the mouth of the Pilica and Kozienice at several places, and was threatening the Warsaw-Ivangorod railway.
Novo Georgievsk was steadily being inclosed. The Russian counterthrusts in the neighborhood of Warsaw both on the north and the south of the city were repelled by night and day. To the south near Gora-Kalvaria a desperate attempt of the Russians to push forward toward the west on the night from July 27th to the 28th, 1915, was shattered.
The armies of Field Marshal von Mackensen, breaking through Russian positions to the west of the Wieprz, captured thousands of prisoners and many guns, and once more thrust back the Russian front between the Vistula and the Bug. On the evening of the 29th they attained the Warsaw-Kiev railway at Biskupice, about halfway between Lublin and Cholm, thus crowning their efforts to get astride their important line of communications. The Russians were destroying everything of value in the country as they retired, even burning grain in the fields.
On the afternoon of July 30, 1915, Lublin at last was occupied by the army of the Archduke Joseph Ferdinand, and on the 31st the Germans of Von Mackensen passed through Cholm. Thus the Teutonic armies were now across the important railway from Warsaw and Ivangorod to Kiev, on a broad front, running all the way down to the Vistula at Novo Alexandria. In Courland the Germans continued to push forward, so that on the 12th of August they were enabled to seize the important railway center Mistan.
Hope in Russia died hard. Press correspondents up to July 29, 1915, still spoke of the possibility of the Russians standing a siege in their principal fortress on the Warsaw salient. On the 29th, however, reports came from Petrograd that the fortresses of the Warsaw defense were to be abandoned and the capital of Poland given up to the army.
The correspondent of the New York "Times" on July 29, 1915, in a special cable summed up the situation in an announcement that the fate of Europe hung on the decision that Russia might make on the question: "Shall Russia settle down to a war of position in her vast fortifications around Warsaw, or shall she continue to barter space against time, withdrawing from the line of the Vistula and points on it of both strategic and political importance, in order to gain the time which Germany has already stored in the form of inexhaustible gun munitions?" The reply was the evacuation of Warsaw.
The decisive blow to Russia's hopes came with the crossing of the Vistula about twenty miles north of Ivangorod on July 28, 1915, already noted. It showed that Warsaw was being rapidly surrounded. The Russian communiqué of the 30th of July told of the crossing over of the Teutons on both sides of the Radomka, a tributary of the Vistula, to the right bank of the Vistula on pontoons, and of attempts to throw bridges across the great rivers. Von Woyrsch's troops that had crossed over were irresistibly pursuing still farther east on the 30th, defeating troops hastily brought up to stop their advance. By August 1 two entire German army corps reached the right bank of the Vistula. Ivangorod, now threatened from all directions, could evidently not be held much longer.
The fortress surrendered on August 4, 1915, after a violent bombardment of the outer forts had taken place, beginning on the first of the month. Austro-Hungarian troops under General von Koevess especially distinguished themselves in the attack on the west front.