The chief difficulty always remains--viz., the chance of seizing the opportunity. In the Battle of Mars la Tour our Cavalry failed to solve the problem, and in the subsequent course of the War--particularly against the forces of the Republic--it might often have obtained far better results had it possessed a clearer conception of its mission and better tactical training, as, for instance, in the action at Coulmiers, where we missed a grand opportunity. The more difficult it becomes, with every increment in the range of firearms, to recognise our opportunities, the more essential is it that we should take the field with a thorough knowledge of our tactical power and its limitations, and it is above all things necessary that we should keep well up to the front, and not shirk even _heavy punishment_ if by so doing we can best secure opportunities for great results. If this end is to be obtained, then every Cavalry Commander requires to have a complete grasp of the nature of the Infantry combat. He must be able to estimate with as equal certainty as an Infantry General the general course of an engagement, the consumption of reserves, and the gradual moral degradation of the enemy's foot soldiers. At any moment he must be able to grasp in his mind the whole balance of forces in conflict on any point of the battle-field, so as to be able to decide whether the employment of his own command at any particular point and time is justified by the general situation of affairs. It is, and always must be, the moments of great crises which give the Cavalry the best opportunities. Since attempts to ride through the zone controlled and swept by effective Infantry fire may be looked on as synonymous with self-destruction, only such moments must be chosen for a charge during which the enemy is prevented from bringing his full fire power to bear against the assailants. These, however, only occur--except always where the nature of the ground allows of a thorough surprise action--when the moral disintegration of the enemy's Infantry is such that, under the impression of the threatening Cavalry attack, they are no longer under control, or when they are so completely taken up with their own fire action that it is impossible for them to concern themselves with the coming danger. Where such opportunities arise they must be seized with lightning-like decision and be exploited with the utmost energy. On the other hand, one should never allow one's self to be induced to undertake charges in which the probable losses bear no reasonable proportion to the possible results. Such conduct could only lead to the purposeless sacrifice of men and horses, just as happened to the French Cavalry at Woerth and Sedan. We can always take as an example the wise restraint exercised by von Seidlitz at Zorndorf, who, in spite of the Royal Command, refused to attack because he did not consider that the right moment had arrived.