The infantry of Gustavus Adolphus, as of all other civilised armies at that period, was made up of pikemen and musketeers, and beyond all doubt had originally been trained and organised on the models of the Spanish and the Dutch. Enough has already been said of these to enable the reader to follow the reforms introduced by the Swedish king. First as regards weapons: the old long pike was cut down from a length of fifteen or eighteen feet to the more modest dimension of eleven feet, and the old clumsy musket with its heavy rest was replaced by a lighter weapon which could be fired from the shoulder without further support. The defensive armour of the pikeman was also reduced to back, breast, and tassets; and thus both divisions of the infantry, carrying less weight than heretofore, were enabled to move more rapidly and to accomplish longer marches without fatigue. This was a first step towards the mobility which the great soldier designed to oppose to the old-fashioned forces of mass and weight. Next as to the tactics of infantry: Gustavus's first improvement was to reduce the old formation from ten ranks to six; his second and more important was to withdraw the musketeers from their old station in the flanks of companies, and to mass pikes and shot into separate bodies. It is abundantly evident that he looked upon the development of the fire of musketry as of the first importance in war, and to this end he sought to render the musketeers independent of the protection of the pikes. This idea led him to a curious revival of old methods, nothing less than a modification of the stakes which were seen in the hands of the English at Hastings and Agincourt, and which now took the name of hog's bristles or Swedish feathers. This, however, was a small matter compared to his improvement in the method of maintaining a continuous fire. Pescayra's system was one which, on the face of it, was not suited to young or unsteady troops. In theory it was a very simple matter that the ranks should fire and file off to the rear in succession, but in practice the temptation to men to get the firing done as quickly as possible and to seek shelter behind the ranks of their comrades was a great deal too strong. The retirement was apt to be executed with an unseemly haste which was demoralising to the whole company, and there was no certainty that the retiring ranks, instead of resuming their place in rear, would not disappear from the field altogether. Gustavus therefore made the ranks that had fired retire through[146] instead of outside their companies, where, through judicious posting of officers and non-commissioned officers, any disposition to hurry could be checked by the blow of a halberd across the shins or by such other expedients as the reader's imagination may suggest. In an advance, again, he made the rear ranks move up successively through the front ranks, and in a retreat caused the front ranks to retire through the rear.