To the complete surprise of the enemy, large movements of troops into West Galicia had been completed by the end of April. These troops, subject to the orders of General von Mackensen, had been assigned the task in conjunction with the neighboring armies of our Austrian ally of breaking through the Russian front between the crest of the Carpathians and the middle Dunajee. It was a new problem and no easy undertaking. The heavens granted our troops wonderful sunshine and dry roads. Thus fliers and artillery could come into full activity and the difficulties of the terrain, which here has the character of the approaches of the German Alps, or the Hörsal hills in Thuringia, could be overcome. At several points ammunition had to be transported amid the greatest hardships on pack animals and the marching columns and batteries had to be moved forward over corduroy roads, (artificial roads made of logs.) All the accumulation of information and preparations necessary for breaking through the enemy's line had been quietly and secretly accomplished. On the first of May in the afternoon the artillery began its fire on the Russian positions. These in some five months had been perfected according to all the rules of the art of fortification. In stories they lay one over the other along the steep heights, whose slopes had been furnished with obstacles. At some points of special importance to the Russians they consisted of as many as seven rows of trenches, one behind the other. The works were very skillfully placed, and were adopted to flanking one another. The infantry of the allied [Teutonic] troops in the nights preceding the attack had pushed forward closer to the enemy and had assumed positions in readiness for the forward rush. In the night from May 1 to 2 the artillery fired in slow rhythm at the enemy's positions. Pauses in the fire served the pioneers for cutting the wire entanglements. On the 2d of May at 6 A.M. an overwhelming artillery fire, including field guns and running up to the heaviest calibres, was begun on the front many miles in extent selected for the effort to break through. This was maintained unbroken for four hours. [Illustration: FIELD MARSHALL VON MACKENSEN Who Commanded the Victorious Teutonic Forces Against the Russians in the Southeast]