In the mean time Schuyler had crossed the Hudson, and slowly fallen back to Stillwater. For this retrograde movement fresh blame was visited upon him by the general public, which at all times is apt to suppose that a war should mainly consist of bloody battles, and which can seldom be made to understand the strategic value of a retreat. The facts of the case were also misunderstood. Fort Edward was supposed to be an impregnable stronghold, whereas it was really commanded by highlands. The Marquis de Chastellux, who visited it somewhat later, declared that it could be taken at any time by 500 men with four siege-guns. Now for fighting purposes an open field is much better than an untenable fortress. If Schuyler had stayed in Fort Edward, he would probably have been forced to surrender; and his wisdom in retreating is further shown by the fact that every moment of delay counted in his favour. The militia of New York and New England were already beating to arms. Some of those yeomen who were with the army were allowed to go home for the harvest; but the loss was more than made good by the numerous levies which, at Schuyler's suggestion and by Washington's orders, were collecting under General Lincoln in Vermont, for the purpose of threatening Burgoyne in the rear. The people whose territory was invaded grew daily more troublesome to the enemy. Burgoyne had supposed that it would be necessary only to show himself at the head of an army, when the people would rush by hundreds to offer support or seek protection. He now found that the people withdrew from his line of advance, driving their cattle before them, and seeking shelter, when possible, within the lines of the American army. In his reliance upon the aid of New York loyalists, he was utterly disappointed; very few Tories joined him, and these could offer neither sound advice nor personal influence wherewith to help him. When the yeomanry collected by hundreds, it was only to vex him and retard his progress. [Sidenote: Use of Indian auxiliaries] [Sidenote: Burgoyne's address to the chiefs]