It was less than a week after the first German advance bodies had taken the outer forts of Liége when Dankl crossed the frontier, heading, with his centre, towards Krosnik and farther towards Lublin. His troops were in Russian territory upon the Monday evening or the Tuesday, 10th-11th August.

The second army meanwhile stood fulfilling its rôle of awaiting and containing any Russians that might strike in upon the south. It had advanced no more than watching bodies towards the frontier, such as the 35th Regiment of the Austrian Landwehr, which occupied Sokal, and smaller units cordonned out southward between that town and Brody. Here, at the outset of the large operations that were to follow, it is important for the reader to note that everything depended upon the resisting power of the second, or southern, army.

Observe the problem. Two men, a left-hand man and a right-hand man, go out to engage two other men whom they hope and believe to be unready. The left-hand man is particularly confident of being able to drive back his opponent, but he knows that sooner or later upon his right the second enemy, a stronger man, may come in and disturb his action. He says therefore to his right-hand companion: "Stand firm and engage and contain the energy of your opponent until I have finished with mine. When I have done that, I shall turn round towards you, and between us we will finish the second man."

Seeing the paucity of Russian communications, and the physical necessity under which the Russians were, on account of the position of their depots and centres of mobilization, of first putting the mass of their men on the south, the physical impossibility under which they lay of putting the mass of their men in the north for the moment, the plan was a sound one; but its success depended entirely upon the tenacity of the second Austrian army, which would have to meet large, and might have to meet superior, numbers.

The first army went forward with very little loss and against very little resistance. The Russian forces which were against it, which we may call the first Russian army, were inferior in number, and fell back, though not rapidly, towards the Bug. It relied to some extent in this movement upon the protection afforded by the forts of Zamosc, but it was never in any serious danger until, or unless, things went wrong in the south. The Austrians remained in contact (but no more), turned somewhat eastward in order to keep hold of the foe, when their advance was checked by the news, first of unexpected Russian strength, later of overwhelming Russian advances towards the south. Long before the third week in August, the first Austrian army was compelled to check its advance upon the news reaching it from the second, and its fortunes, in what it had intended to be a successful invasion of Russian Poland, had ended. For the whole meaning of the first Galician campaign turns after the 14th of August upon the great Russian advance in the south.

It was upon that day, August 14, that the Russian force, under General Russky (which we will call the second army), crossed the frontier. Its right occupied Sokal, its centre left moved in line with the right upon von Auffenberg's force directly before it.

The Russian mobilization had proceeded at a greater pace than the enemy had allowed for. The Russian numbers expected in this field appeared in far greater strength than this expectation had allowed for, and it was soon apparent that von Auffenberg's command would have to resist very heavy pressure.

But it would be an error to imagine, as was too hastily concluded in the press of Western Europe at the time, that this pressure upon the front of the second Austrian army, with its dogged day after day fighting and mile by mile advance, was the principal deciding factor in the issue. That deciding factor was, in fact, the appearance upon the right flank of von Auffenberg of yet another Russian army (which we will call the third) under Brussilov. It was the menace of this force, unexpected, or at least unexpected in its great strength, which really determined the issue, though this was again affected by the tardiness of the Austrian retirement. Russky's direct advance upon the front of his enemy extended for a week. It had begun when it had destroyed the frontier posts upon Friday, the 14th. It was continued until the evening of the succeeding Thursday, regularly, slowly, but without intermission. It stood upon the Friday, the 21st—the day on which the first shots were fired at the main Franco-British forces in the West, and the day on which the first shell fell into Charleroi station—not more than one day's cavalry advance from the outer works of Lemberg, but it was just in that week-end that the pressure of Brussilov began to be felt.

This third Russian army had come up from the south-east, supplied by the main Odessa railway through Tarnopol. It was manifestly threatening the right flank of von Auffenberg, and if a guess may be hazarded upon operations on which we have so little detail as yet, and which took place so far from our own standpoint, the error of the Austrian general seems to have consisted in believing that he could maintain himself against this flank attack. If this were the case (and it is the most probable explanation of what followed), the error would have been due to the same cause which affected all Austrian plans in these first days of the war—the mistake as to the rapidity with which Russia would complete her preparations.