At the beginning of the fourteenth century gunpowder was brought from the Arabs to Western Europe and, as every schoolboy knows, entirely revolutionized warfare. The introduction of gunpowder and firearms was however by no means an act of force but an industrial and therefore economic advance. Industry is still industry whether its object in the creation or the destruction of material things. The introduction of firearms not only produced a revolution in the methods of warfare but also in the relations of master and subject. Trade and money are concomitants of gunpowder and firearms and these former imply the bourgeoisie. Firearms from the first were bourgeois instruments of warfare employed on behalf of the rising monarchy against the feudal nobility. The hitherto unassailable stone castles of the nobles submitted to the cannon of the burghers, the fire of their guns pierced the mail armor of the knights. The supremacy of the nobility fell with the heavily armed cavalry of the nobility. With the development of the bourgeoisie, infantry and artillery became more and more the important arms of the service and because of artillery the trade of war had to create another industrial subdivision, to-wit, engineering. The development of firearms proceeded very slowly. Shooting remained clumsy and small arms were ineffective in spite of many individual inventions. Three hundred years elapsed before a musket was produced which sufficed for the arming of a complete infantry. First at the beginning of the eighteenth century, a musket with a bayonet attached, which discharged a stone superseded the pike as an infantry weapon. The infantry of that day was exceedingly unreliable, only kept together by physical force, composed of the basest elements of society, frequently made up of men picked up by the press gang and prisoners of war intermingled with soldiers recruited by the various princes. The only fighting formation in which these soldiers could be made to use the new weapon was the linear tactic, which reached its highest development under Frederick II. The whole infantry of an army was drawn up in a very long hollow square three files deep and advanced in battle array en masse. It was usually permitted to one of the two wings to be a little in advance or a little in the rear. This helpless body could only advance and keep its formation on perfectly level ground and then only at a slow marching time (seventy-five steps to the minute) a change of formation during the fight was impossible and victory or defeat was determined rapidly at a stroke as soon as the infantry came under fire.