Galicia is a long, level country lying north of the Carpathian Mountains, and in this country Austria-Hungary had gathered together a force of hardly less than one million men. A quarter of these lay in reserve near the mountains; the remaining three-quarters was divided into two armies; the first, the northern army, being under the command of General Dankl, the second was that of von Offenberg. The base of the first army was Przemysl; that of the second was Lemberg. The first army, it was planned, was to advance into Russian territory in the direction of Lublin. The second army, stationed southeast of the first army, was to protect it from any Russians who might strike in upon the south. The first army, therefore, contained more picked material than the second, which included many troops from the southern parts of the empire, including certain disaffected contingents. The first army made its advance as soon as possible, and entered Russian territory on the 11th of August. It went forward with very little loss and against very little resistance. The Russian forces which were against it were inferior in number, and fell back towards the Bug. The Austrians followed, turning somewhat toward the east, when their advance was checked by news of catastrophe in their rear. On the 14th of August the Russian army under General Ruzsky crossed the frontier, and advanced toward the Austrian second army. The Russian army was in far greater strength than had been expected, and when its advance was followed by the appearance upon the right flank of von Offenberg's command, of yet another Russian army, under Brussilov, the Austrian second army found itself in great danger. Ruzsky advanced steadily from August 14th until, on the 21st, it was not more than one day's advance from the outer works of Lemberg, and the third Russian army under Brussilov was threatening von Offenberg's right flank. Von Offenberg, underestimating the strength of the enemy, undertook to give battle. The first outpost actions were successful for the Austrians, and helped them in their blunder. On the 24th of August the two Russian armies effected a junction, and their Austrian opponents found themselves threatened with disaster. An endeavor was made to retreat, but the retreat turned into a rout. On the 28th Tarnopol was captured by the Russians, and the Austrian army found itself compelled to fall back upon defense positions to the south and east of Lemberg itself.