A very unusual thing in war it is to see an army which has just been acting strictly on the defensive suddenly elude its adversary for the purpose of carrying the war into that enemy's country! It marks a new epoch in the history of that war, and it supposes wholly altered conditions. In this particular instance Lee's moves were so bold as almost to savor of contempt. It is enough to know that Lee was now in Pennsylvania, at the head of seventy thousand men, before our army reached the Potomac in pursuit of him, if following at a respectful distance be called a pursuit. [Sidenote: State of his Army.] At no period of the war, their own officers said, had the Confederates been so well equipped, so well clothed, so eager for a fight, or so confident of success; and we may add our own conclusions, that never before had this army taken the field so strong in numbers, or with such a powerful artillery.[9] [Sidenote: Superiority as Marksmen.] The infantry were armed with Enfield rifles, fresh from British workshops, and it is probable that no equal number of men ever knew how to use them better. Indeed, we consider it indisputable that the Confederates greatly excelled the Union soldiers as marksmen. Most of them were accustomed to the use of firearms from boyhood; in some sections they were noted for their skill with the rifle. The Confederates, therefore, were nearly always good shots before they went into the army, while the Union soldiers mostly had to acquire what skill they could after going into the ranks. In the South the habit of carrying arms was almost universal: in the North it was not only unusual, but unpopular as well as unlawful. [Sidenote: Superiority in Cavalry.] Man for man, the Confederate cavalry was also superior to the Union horse, because in one section riding is a custom, in the other a pastime rarely indulged in. Consequently, it took months to teach a Union cavalryman how to ride,--a costly experiment when your adversary is already prepared,--whereas if there is anything a Southerner piques himself upon, it is his horsemanship.[10] [Sidenote: Cavalry Advance.] [Sidenote: Cumberland Valley raided.] Lee's cavalry had preceded the infantry by nearly a week, reaching Chambersburg on the 16th, seizing horses and provisions for the use of the army behind them, and spreading consternation to the gates of Harrisburg itself. Having loaded themselves with plunder unopposed, they then fell back upon the main army, thus leaving it in some doubt whether this raid accomplished all it designed, or was only the prelude to something for which it was serving as a mask.[11] [Sidenote: Ewell at Chambersburg.] [Sidenote: Hood's Soldiers.]