ARTICLE XX.
Fronts of Operations, Strategic Fronts, Lines of Defense, and Strategic Positions.
There are some parts of the military science that so closely resemble each other, and are so intimately allied, that they are frequently confounded, although they are decidedly distinct. Such are fronts of operations, strategic fronts, lines of defense, and strategic positions. It is proposed in this article to show the distinction between them and to expose their relations to each other.
FRONTS OF OPERATIONS AND STRATEGIC FRONTS.
When the masses of an army are posted in a zone of operations, they generally occupy strategic positions. The extent of the front occupied toward the enemy is called the strategic front. The portion of the theater of war from which an enemy can probably reach this front in two or three marches is called the front of operations.
The resemblance between these two fronts has caused many military men to confound them, sometimes under one name and sometimes under the other.
Rigorously speaking, however, the strategic front designates that formed by the actual positions occupied by the masses of the army, while the other embraces the space separating the two armies, and extends one or two marches beyond each extremity of the strategic front, and includes the ground upon which the armies will probably come in collision.
When the operations of a campaign are on the eve of commencing, one of the armies will decide to await the attack of the other, and will undertake to prepare a line of defense, which may be either that of the strategic front or more to the rear. Hence the strategic front and line of defense may coincide, as was the case in 1795 and 1796 upon the Rhine, which was then a line of defense for both Austrians and French, and at the same time their strategic front and front of operations. This occasional coincidence of these lines doubtless leads persons to confound them, while they are really very different. An army has not necessarily a line of defense, as, for example, when it invades: when its masses are concentrated in a single position, it has no strategic front, but it is never without a front of operations.