The troops of the Archduke Joseph Ferdinand, after a stubborn resistance on the part of the Russians, seized enemy positions on July 21, 1915, near Chodel and Borzechow, advancing another step toward Lublin. Eight thousand Russian prisoners, 15 machine guns, and 4 ammunition wagons were taken. By the 23d of July, 1915, the Teutonic troops were close up to the encircling forts of Ivangorod and stood on the Vistula all the way between the fortress and the mouth of the Pilica. On the 24th the Teutons announced a victory over the Fifth Russian Army by General von Buelow at Shavli. The report read: "After ten days of continuous fighting, marching, and pursuit, the German troops yesterday succeeded in bringing the Russians to a stand in the regions of Rozalin and Szadow and in defeating them and scattering their forces. The booty since the beginning of this operation on the 14th of July consists of 27,000 prisoners, 25 cannon, 40 machine guns, more than 100 loaded ammunition wagons with their draft animals, numerous baggage wagons and other material." This day brought the announcement also of the capture of the fortresses of Rozan and Pultusk on the Narew, after violent charges by troops of General von Gallwitz. The crossing of the Narew between these places was now in German hands, and strong forces were advancing on the southern shore. The Russians had been resisting obstinately in this quarter, and the Germans had made their way only by the most heroic efforts. German headquarters announced at this time that in the battles between the Niemen and the Vistula covering the ten days since July 14, 1915, more than 41,000 prisoners, 14 cannon, and 19 machine guns had been captured. The German troops now also attained the Vistula to the north of the Pilica. In their summing up of results since the 14th of July the Teutons recounted further on this day, the 24th, that some 50,000 prisoners had been taken by the armies of General von Woyrsch and Field Marshal von Mackensen during the period. The army of Archduke Joseph Ferdinand had been making rapid progress. On July 24, 1915, under the attacks of these troops the Russians retreated on a front of forty kilometers, between the Vistula and the Bistritza, from eight to ten kilometers northward to prepared lines, their attempts to halt in intermediate positions being frustrated by the onrush of the victorious Teutonic forces in pursuit. By July 25, 1915, the Narew had been crossed by the Germans along its whole front, southward from Ostrolenka to Pultusk, and by the 26th they had gained the farther side of the Narew above Ostrolenka likewise. The troops moving southeast from Pultusk now approached the Bug, getting toward the rear of Novo Georgievsk and Warsaw, and threatening to close the Russians' line of escape, the Warsaw-Bielostok railway.