There can be no doubt that the value and significance of cavalry in a future war will be chiefly demonstrated in the action of the army cavalry.[4] The army cavalry alone, by virtue of its fighting strength, will be able to carry out the larger services of reconnaissance, to operate against the enemy's communications, to take part in the tactical decision with a force commensurate with modern conditions, or to carry out a pursuit. Reconnaissance occupies a prominent position amongst these various duties. There will not be a battle every day. Not in every fight will considerations of ground and other circumstances allow of the cavalry taking part in a great decision as a mounted arm. Not always will an effective pursuit by the cavalry mass be possible. It must be remembered that in order not to render itself too weak to carry out its proper rôle cavalry must not expose itself to heavy loss in battle without sufficient reason. Only the possibility of a very great success can justify the risk of staking the whole cavalry force in a decisive charge during the battle. It is true that efforts will have to be made to drive the hostile cavalry from the field to facilitate operations against the flank and rear of the enemy's line of battle. But such operations will generally be limited to fire action, and in a decisive battle the weakness of the cavalry would probably debar it from such undertakings. Engagements, also, that are fought with a view of opening a way for reconnaissance will not be of frequent occurrence, and must only be expected during occasional crises. They will, however, be of decisive value for the whole future conduct of the arm and its operative success. The same may be said of raids against the enemy's communications. Such undertakings may exercise the greatest influence on the course of a campaign, but can only be undertaken under specially favourable conditions. On the other hand, the everyday task of the cavalry which goes hand in hand with all these various engagements and enterprises is _reconnaissance proper_ carried out by reconnoitring squadrons and patrols. This is the daily bread of the cavalry, a duty that throughout a war should never cease to be performed, even if the main body of the cavalry has been driven from the field by the enemy. It demands, therefore, the highest training, the wisest economy of force and systematic arrangement, if it is not to become ineffective or useless. In close and continual relation to the above is the further task of safeguarding and screening the army. Reconnaissance itself provides a measure of security, but it is always liable to miscarry, and can never secure the army against hostile observation. Reconnaissance must therefore be supplemented by a special system of security and screening which, however, demands the most careful organisation, and greatly increases the difficulty of husbanding limited forces and of keeping the troops fit by not overworking them.