Then came the crowning period for Cavalry in modern war. In spite of their recognised place on the battlefield, and their many successes, the horsemen of the European armies had not until the middle of the eighteenth century attained to a full comprehension of their possible influence. Awed to some extent by the reputation which the Infantry had gained at their expense in the course of the last three centuries, the Cavalry had become a less swift and dashing arm. They had learnt to rely in large measure upon their fire, and even to fight dismounted as dragoons. “In fact,” according to their historian Denison, “the cavalry of all European States had degenerated into unwieldy masses of horsemen, who, unable to move at speed, charged at a slow trot and fought only with pistol and carbine.” Even so they were more mobile than Infantry, and had great achievements to their credit; but they had failed to see that a recent change in armaments had thrown the game into their hands. The Infantry, growing over-confident, had discarded the long pike for the bayonet--a very poor substitute--and the Cavalry had once more a chance of riding down their enemy in fair fight by the speed and weight of their horses. Their power was now to be taught them by a keen-sighted soldier, Frederick the Great of Prussia. When he came to the throne in 1740, and began the career of unscrupulous aggression which was to make Prussia one of the leading nations of Europe, he soon saw that his Cavalry was not all it should have been. “They were,” says Denison, “large men mounted upon powerful horses, and carefully trained to fire in line both on foot and on horseback,” but they were quite incapable of rapid movement, and never attacked Infantry by the ancient method. “His first change was to prohibit absolutely the use of firearms mounted, and to rely upon the charge at full speed, sword in hand.” Marlborough had shown the advantage of using great bodies of Cavalry in mass, and Marshal Saxe had advocated their being taught to move at speed for a mile or more in good order. Frederick now took over both ideas, and by careful and incessant training evolved a Cavalry which was capable of manœuvring in thousands together at full pace, even over rough ground, without disorder or loss of control. Such a force, led by men like Seidlitz and Ziethen, proved to be almost irresistible. Against Austrians and Russians and Frenchmen alike, it had astonishing success. “Out of twenty-two great battles fought by Frederick, his Cavalry won at least fifteen of them. Cavalry at this time reached its zenith.” Frederick’s system was copied by all the great military nations of Europe, and at the close of the eighteenth century the influence of horsemen in the field was greater than it had ever been since the battle of Crécy.