During April, 1915, a number of changes had taken place among the commanding officers of the Austro-German armies; the new dispositions of groups along the battle line differ considerably from those which obtained during the fighting for the passes. The line was now enormously strengthened, and more compact. This applies only to the Germanic side; there is little change on the Russian. At this stage the Russian front on the west of Galicia extended from Opatovie on the Polish frontier along the Dunajec, Biala, and Ropa Rivers by Tarnow, Ciezkovice, and Gorlice down to Zboro in Hungary; from here it runs eastward past Sztropko, Krasnilbrod, Virava, and Nagy Polena to the Uzsok Pass, a distance of about 120 miles. Ewarts commanded the army on the Nida; the Dunajec-Biala line was still held by Dmitrieff, Commander in Chief of the Eighth Russian Army; Brussilov still commanded the main army of the Carpathians, and Lechitsky in the Bukowina in the place of Alexeieff, who had succeeded General Russky in the northern group. The whole southern group, from the Nida to the Sereth inclusive, was under the supreme command of General Ivanoff. Facing Dmitrieff on the Dunajec front stood now the Fourth Austro-Hungarian Army under the Archduke Joseph Ferdinand, about five army corps, including a German cavalry division under General von Besser; then the Ninth and Fourteenth Austrian Army Corps; to their right, several Tyrolese regiments; the Sixth Austro-Hungarian Army Corps of General Arz von Straussenburg, with the Prussian Guards on his left and Bavarian troops under Von Emmich on his right; the Eleventh German Army Corps under Von Mackensen; the Third Austro-Hungarian Army under General Boroyevitch von Bojna; the Tenth Army Corps under General Martiny. This formidable combination now confronted the Dunajec-Biala positions, which Dmitrieff had held without exertion for four months. Only a mile or two away he still inspected his trenches and conducted his minor operations, totally unconscious of the brewing storm specially directed against him. The Laborza district was held by the Archduke Joseph with the Seventh Army Corps; on his left stood a German corps under Von Marwitz, and on his right the Tenth Army Corps, north of Bartfeld, with some additional forces in between. Around the Lupkow and Uzsok passes the Second Austro-Hungarian Army under Boehm-Ermolli was stationed where it had been since February, 1915. Next, on the right, the Austro-Hungarian army corps under Von Goglia; in the Uzsok lay an army under Von Szurmay, nearly all Magyars, of whom the chief commander was Von Linsingen. Farther eastward stood a Prussian corps, embodying a division of Prussian Guards and other regiments commanded by General Bothmer, a Bavarian, who had been reenforced with a Hungarian division under Bartheldy; then followed the corps of Generals Hofmann and Fleischman, composed of all Austrian nationalities, intrenched in the mountain valleys.