In this lack of freedom in the conduct of the divisional cavalry two facts become apparent. Firstly, that only in very rare cases will the divisional cavalry be able to clear the way for its patrols, as the army cavalry will continually have to do. It is generally, indeed, too weak to fight independently with any prospect of success. It is also, as we have seen, locally dependent, and cannot advance with full freedom even where hindrances to the reconnaissance demand its intervention. Secondly, only in exceptional cases will it be feasible for the divisional cavalry to immediately support its patrols by reconnoitring squadrons. If the army corps is marching in two columns, the cavalry of each is obviously too weak to push forward squadrons of this kind perhaps several days' march ahead, and, when necessary, to provide for their relief. Somewhat different are the conditions of the advance of a corps upon one road. If it is accompanied by columns on each side, it will generally be possible to mass the greater part of the cavalry of both divisions at the head of the corps, and it will then at times be possible to push forward a reconnoitring squadron. In the case of a flank column, however, the cavalry of the rear division will generally be occupied with securing the flank, and will therefore not usually be available for reinforcing the reconnoitring cavalry in front. The divisional cavalry will thus usually be able to detail only weak patrols for the distant reconnaissance, and these will often have to reckon with superior hostile cavalry. At least the conditions which obtain in the army of our probable opponents compel us to make these presumptions. The reconnoitring patrols of the divisional cavalry must therefore rely chiefly on cunning and speed in carrying out their duty, and will only be able to attack under especially favourable circumstances, where the enemy whom they meet has no support behind him, or can be attacked with obvious advantage. It is far more important for them than for the patrols of the army cavalry to gain contact with the enemy unsuspected, and not to betray their presence. They must always try first to get distant observation of the enemy, as they will have no fighting support behind them to help them to break through the hostile screen of patrols and win their way to the head of the enemy's columns. Their reports, also, will have to be brought back through the enemy's cavalry. The distant patrols of the divisional cavalry will therefore often be obliged, even in their advance, to avoid the main avenues of approach of the enemy, as upon them the enemy's cavalry is certain to be met with. They must use secondary roads, and as secretly as possible, a matter of considerable difficulty in unknown hostile country. To avoid possible ambush they should retire by a different road from that by which they advanced. They will very rarely be able to get under cover for the night, especially when in the enemy's country.