CAVALRY
Squad: any small number of men, usual 7, under a corporal. Platoon: a sub-division, usually half, of a company under a lieutenant. Troop: 2 to 6 platoons, 76 to 100 men, under a captain. Squadron: 2 to 4 troops under a senior captain or a major. Regiment: 10 troops—or 4 to 6 squadrons—under a colonel. Brigade: 3 or 4 regiments under a brigadier-general. Division: 2 to 4 brigades under a major-general.