certainly commences later than that of the assailant, but still time enough to break the chains of paralysing inaction), then this advantage of greater concentration and the interior lines tends much more decisively, and in most cases more effectually, towards victory than the concentric form of the attack. But victory must precede the realisation of this superiority; we must conquer before we can think of cutting off an enemy’s retreat. In short, we see that there is here a relation similar to that which exists between attack and defence generally; the concentric form leads to brilliant results, the advantages of the eccentric are more secure: the former is the weaker form with the positive object; the latter, the stronger form with the negative object. In this way these two forms seem to us to be brought nearly to an even balance. Now if we add to this that the defence, not being always absolute, is also not always precluded from using its forces on converging lines, we have no longer a right to believe that this converging form is alone sufficient to ensure to the offensive a superiority over the defensive universally, and thus we set ourselves free from the influence which that opinion usually exercises over the judgment, whenever there is an opportunity.
What has been said up to the present, relates to both tactics and strategy; we have still a most important point to bring forward, which applies to strategy only. The advantage of interior lines increases with the distances to which these lines relate. In distances of a few thousand yards, or a half mile, the time which is gained, cannot of course be as much as in distances of several days’ march, or indeed, of twenty or thirty miles; the first, that is, the small distances, concerns tactics, the greater ones belong to strategy. But, although we certainly require more time, to reach an object in strategy, than in tactics, and an army is not so quickly defeated as a battalion, still, these periods of time in strategy can only increase up to a certain point; that is, they can only last until a battle takes place, or, perhaps, over and above that, for the few days during which a battle may be avoided without serious loss. Further, there is a much greater difference in the real start in advance, which is gained in one case, as