To utilise woods for this purpose it will be necessary, according to the circumstances, the depth and nature of the wood, to post the fighting detachments of the screening line either at the exit of the defile on the enemy's side or more towards the defender's side on the inner edge of the wood, if they can there find a good field of fire. In any case the opposite edge of the wood should be occupied by observation-posts; in order, in the first case, to get knowledge of and to neutralise any hostile patrol which may, in spite of all difficulties, have penetrated the wood, as soon as they emerge; and, in the second, to get early information of the entrance of hostile detachments into the wood, and to be able to hinder, report, and observe their further advance. I think that penetration of such a screen is generally considered to be easier than it really is, especially if the defending cavalry is supported by cyclists, machine-guns, and even artillery. According to my opinion, reconnoitring squadrons would only, under favourable circumstances, be able to break through such a line that has been well disposed, and, even if successful in so doing, would find it even more difficult to return. It should never be forgotten that to overcome well-placed posts, defending themselves with fire action, requires a great superiority of force; that a squadron can only overcome quite weak detachments so placed, and will, if successful, very soon find itself confronted by a superior force of the enemy's reserves. Single patrols of picked scouts may perhaps creep through, but their return will be problematical unless they are strongly supported from the rear. It will therefore generally require strong forces of the army cavalry to break through a well-organised screening line composed of moderately strong cavalry detachments, and to maintain the breach so made long enough to carry out the object of the reconnaissance. The place where the screen is broken must in all cases, even where the main body of the victorious reconnoitring cavalry is obliged to advance farther, be so strongly occupied that it will under all circumstances remain open for the service of transmission and for the eventual retirement. The greater the advantages of a defensive screen, the more must the divisional cavalry naturally endeavour to avail itself of it, in order to compensate in some measure for its numerical weakness. It will always seek, even during the advance of the army, to choose such favourable areas for an occasional halt, and to reach them by advancing in _bonds successifs_. Such procedure will facilitate at the same time the carrying out of its duties of screening and of warding off hostile detachments by defensive action. In order to secure the greatest possible effect for such action a similar procedure as regards time and space must be arranged with the cavalry of neighbouring columns, or ordered by superior authority.