It is true the defensive side can no longer refuse a battle, yet he may still avoid it by giving up his position, and the rôle with which that position was connected: this is however half a victory for the offensive side, and an acknowledgment of his superiority for the present.
This idea in connection with the cartel of defiance can therefore no longer be made use of in order by such rhodomontade to qualify the inaction of him whose part it is to advance, that is, the offensive. The defender who as long as he does not give way, must have the credit of willing the battle, may certainly say, he has offered it if he is not attacked, if that is not understood of itself.
But on the other hand, he who now wishes to, and can retreat cannot easily be forced to give battle. Now as the advantages to the aggressor from this retreat are often not sufficient, and a substantial victory is a matter of urgent necessity for him, in that way the few means which there are to compel such an opponent also to give battle are often sought for and applied with particular skill.
The principal means for this are—first surrounding the enemy so as to make his retreat impossible, or at least so difficult that it is better for him to accept battle; and, secondly, surprising him. This last way, for which there was a motive formerly in the extreme difficulty of all movements, has become in modern times very inefficacious.
From the pliability and manoeuvring capabilities of troops in the present day, one does not hesitate to commence a retreat even in sight of the enemy, and only some special obstacles in the nature of the country can cause serious difficulties in the operation.
As an example of this kind the battle of Neresheim may be given, fought by the Archduke Charles with Moreau in the Rauhe Alp, August 11, 1796, merely with a view to facilitate his retreat, although we freely confess we have never been able quite to understand the argument of the renowned general and author himself in this case.