In the United States all of the forces are now provided with standard arms or weapons. The army, the Marine Corps and the organized militia of the States, absorbed into the body proper of national troops, have the same firearms--the same service rifles, the same machine guns and field guns and the same automatic pistols. One kind of cartridge--containing a cylindro-conical bullet of copper-nickel, with a lead core--serves for all rifles and for the machine guns as well. OLD FLINTLOCK IN WAR. Many people, perhaps, will be surprised to learn that the Mexican war was fought mainly with the antiquated flintlock muskets. When the trigger was pulled the flint came down hard upon a piece of steel, and the resulting spark was thrown into the "pan," igniting a pinch of powder. The fire ran into the powder charge and the gun went off. Round balls were used, and the loading was done with the help of a ramrod. There were already percussion rifles in those days, but General Winfield Scott, who bossed the Mexican war, declared that he would have nothing to do with those new-fangled weapons. The old smooth-bore flintlock was good enough for him. In truth, the percussion gun of that period was not as reliable as might have been wished. The cap was liable to get wet and to fail to go off, whereas a good flint could be counted upon to yield a spark every time. It was not until 1858 that the percussion rifle, still a muzzle-loader, was generally used by the United States army. The Springfield, which was the first breech-loader (one cartridge inserted at a time) came along in 1870. In 1892 it was replaced by the first of our magazine rifles, the Krag, and simultaneously we adopted smokeless powder, a European invention. The regulation United States service rifle is a great improvement on the Krag. It is loaded with "clips," holding five cartridges each. The velocity of the bullet is greater, and the accuracy and rapidity of fire are superior. FIGHTING RANGE 800 YARDS. In the Mexican war the ordinary fighting range, with the smooth-bore flintlock, was about 250 yards. In the Civil War, with the percussion muzzle-loader, it was 350 to 400 yards. With the new service rifle, the fighting range is 700 to 800 yards, and the infantryman is able to fire at least twenty times as many shots in a given number of minutes as was possible fifty years ago. The field artilleryman carries no rifle, but is provided with a 45-caliber automatic pistol and twenty-one cartridges. The men who compose the machine-gun platoons have no rifles, but each one of them is armed with the same sort of service pistol and a bolo. The latter is a weapon new to our army, adopted as a result of military experience in the Philippines. It is in effect a machete (a sugar cane chopping knife), shortened and made heavier. At close quarters it is a formidable weapon.