The fighting part of a cavalry regiment consists of three squadrons, each divided into four troops, with some additional officers and men. A troop consists of one officer and thirty-two men, and a squadron of 160 officers and men, so that a cavalry regiment numbers 480. At the head of the regiment is a lieutenant-colonel, and the "second in command" is a major, who takes the place of the colonel if he should be killed or put out of action. In every cavalry regiment there are also shoeing-smiths, saddlers, etc., as well as a doctor and a veterinary surgeon. Every cavalry regiment is accompanied by a machine-gun section. In the British Army three regiments form a cavalry brigade. Each cavalryman is armed with a rifle and a sabre. In a Lancer regiment all the men carry lances as well; in a Dragoon regiment the front rank men alone are armed with these weapons. The rifle is carried with its butt in a leather case, and its barrel passes through a loop around the cavalryman's left arm. As you will see from the drawing on p. 194, he carries many other things as well. In time of peace a British cavalry regiment marches in double file, the officers riding on the flank of their respective troops or squadrons. On ordinary marches the horses "walk" at the rate of four miles an hour, and the "trot" of eight miles per hour is only resorted to when time presses, or when men and horses are becoming chilled. If for any reason the "gallop" becomes necessary, the men at once form fours, and dash along at the rate of fifteen miles an hour. In time of war a cavalry regiment usually operates at the "trot." [Illustration: Troopers and their Equipment. The trooper's uniform is the same as that of the infantryman. Until a few years ago he was armed with a carbine (3), which he carried in a leather bucket (4), attached to the right side of the saddle by straps. He is now armed with the infantry rifle. This is not shown in the pictures, but is carried as the carbine was, with its butt in a leather case hanging by straps from the saddle near the man's left heel. Its barrel passes through a loop around his right arm, as the lance is carried. (See picture on the right.) 1 is the loop attaching lance to the arm; 2, the sabre; 3, the carbine; 4, the bucket; 5, the bandolier, carrying cartridges; 6, a pair of boots; 7, a cloak; 8, a saddlebag, holding knife, fork, spoon, brush, comb, towel, emergency ration, etc.; 9, a saddlebag, holding shirt, drawers, socks, currycomb, stable-brush, etc.; 10, breeches and puttees rolled in waterproof sheet; 11, hay net; 12, nosebag, holding corn; 13, picketing ropes; 14, haversack with man's food; 15, water-bottle; 16, two horse-shoes in leather case; 17, numnah (felt to save horse's back) and horse-blanket under the saddle; 18, halter; 19, halter-rope twisted up.]