But there is scarcely an agency that has been employed during this wonderful century for the improvement of the condition of man that has not been enlisted for his destruction. Steam, electricity, chemical knowledge, engineering skill, and mechanical invention have all been employed in the science of war, and everything pertaining to the organization, arms, equipment, supply, training, and even the size of armies, has been so revolutionized that there is scarcely anything in common between the forces that fought at Marengo and those employed in recent wars, except the characteristic of being armed and organized bodies of soldiers under military leadership. The nineteenth century was born in the midst of war. All Europe was an armed camp, and the contest between the principles of the French Revolution and the old feudal system had taken the form of actual strife upon the field of battle. A great alteration was taking place in the methods of war; the old pedantic strategy of the Austrian school had already received a rude shock at the hands of the brilliant young Bonaparte, and the old tactical methods bequeathed by Frederick the Great were, also, soon to be shattered by the genius of the newer and greater warrior. To appreciate the changes that were already being made in military methods, a brief glance at the organization of the armed forces in the latter part of the eighteenth century is necessary. The Prussian army, as organized by the great Frederick, was regarded as the finest of the time. In it the most exact and machine-like methods were observed, the most careful accuracy in marching was required, drill was carried to mechanical perfection, volley firing was conducted with the greatest precision, and no skirmishers were employed. In comparison with later methods, the whole system may be characterized as exact, methodical, and slow. Armies were supplied entirely from magazines, by means of long and cumbrous trains, and the art of moving rapidly and subsisting on the country was still to be discovered. [Illustration: OLD STYLE SHRAPNEL.]