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 application of common sense to the conduct of war." For practical purposes it is sufficient to define strategy as the science of the conduct of war, tactics as the science of troop-leading. Strategy brings about the decision on the theater of war, while the duty of carrying it out, in the manner desired by the commander-in-chief, devolves upon tactics. Thus the strategical idea culminates on the battlefield. The concentric advance of the Prussian armies into Bohemia in 1866 naturally led to a complete envelopment of the Austrians on the field of Königgrätz. The German attack in the battle on the Hallue, Dec. 23rd, 1870, was based on the strategical requirement of driving the French from their line of retreat leading to Arras and Bapaume, by enveloping their right flank. The attempts made by the 15th Infantry Division, which was holding the enemy in front, to envelop the left wing of the French, interfered with the execution of the correct strategical plan. Thus, in following up a success, in itself quite unimportant (the capture of Bussy), the leading basic principle was forgotten. The same thing happened here that Moltke censured in his official report on the war of 1866, wherein he stated: "The higher commanders have not been able to make their influence felt down to the subordinate grades. Frequently, as soon as the divisions and brigades have come in contact with the enemy, all control over them has entirely ceased."

Archduke Charles considered the subordination of tactics to strategy a law. "Tactics should execute the conceptions of strategy; where the two come in conflict, where strategical considerations are opposed to tactical interests, the strategical considerations should, as a rule, take precedence. Tactics must occupy a subordinate place and attempt to neutralize existing disadvantages by skillful dispositions." Clausewitz not unjustly censures Archduke Charles for placing advantages of terrain in the first rank, and for failing to attach the proper importance to the annihilation of the hostile forces.