Her plan of campaign amounted to an attempt to force the reversal of the Russian plan. The main army was to carry out a vigorous invasion of Poland in two directions, towards Lublin on the north-east and towards Lodz on the north. The latter movement would receive help from the Germans operating in the province of Kalisch. The success of these movements would render a determined invasion of Galicia from the east impossible. Russia would have to change her plan and concentrate her efforts on defeating the invading Austrians and driving them back across the frontier. Obviously this would have suited the German plans admirably, because it would have delayed the Russian advance indefinitely, and so relieve the dangerous position resulting from the unexpected success of the Russian mobilisation and the equally unexpected failure of the attempt to crush France in the course of a few weeks. Viewing the war as a whole, therefore, the main object of both sides was to gain time. The Allies wanted to delay the German advance until the pressure of Russia on the east became unbearable. The Austrian object was to hold Russia in check and so enable Germany to maintain an undiminished army in the west. The issue of the whole war now depended on the efforts of Austria, for even if the Allies in the west were able, as the result of a vigorous offensive, to force the Germans out of France and Belgium, it was extremely doubtful whether they would be able to invade Germany itself with anything more than moderate success, unless the Germans were forced to divide their troops more or less equally between the two frontiers. The most important operations in the east, therefore, were the advance of the main Austrian army on Lublin and the advance of the Germans through Kalisch. Until these were positively checked the projected Russian advance could not be pushed forward. But, once checked, a successful Russian advance would cause the retirement or downfall of these invaders of Poland unless they were heavily reinforced.