While the fight for Przemysl was in full swing an important event of the war occurred--Italy joined the enemies of Austria on May 3, 1915; the Dual Monarchy had now to defend her western frontier as well. Dankl and Von Bojna were transferred to the Italian front with a considerable portion of their Galician troops. A general redistribution of units was effected among the Austrian and German armies. The army of the Archduke Joseph Ferdinand was held along the lower San as far as Sieniava. Von Mackensen was advancing east of Jaroslav along the railway toward Rawa-Ruska. Boehm-Ermolli was fighting on the road to Lemberg from Mosciska. An army under Count Bothmer was operating near the Dniester marshes, beyond which, farther south, a group of armies under Von Linsingen (mainly German) had forced the passage of the Dniester at Zuravno, and was trying to advance on Lemberg and catch Ivanoff's main forces on the flank. This last movement, if successful, would be the most effective method of crushing the retreating Russian armies: being thus outflanked, some of their lines of retreat would be cut and a dissolution of a large portion of the retiring forces could hardly have been avoided. However, all attempts in this direction failed. The Russians gradually rolled up their line on the Dniester from west to east, keeping step with the retreat of the armies which were facing west. With strong reenforcements from Kiev and Odessa Brussilov commanded the Dniester front under the direction of General Ivanoff. If only the ponderous advance of Von Mackensen could have been arrested, Brussilov would have had little difficulty in sweeping Von Linsingen back to the Carpathian barrier. A somewhat similar condition existed in the north, where the Austrians were at the mercy of Ivanoff's strong right wing.