It started back in the neolithic era when logs were used as rollers to aide in the moving of large things. During the copper age people began sawing out disc shaped sections of logs, cutting holes into their middle to make crude wheels to make sledges and travois easier to move. Gradually crude carts and wagons took form for transporting goods and eventually carpenters refined the design. Eventually (with some help from pastoral peoples) the design was refined with lighter spoked wheels and construction to produce a chariot. Drawn by two or four Stolleths, a chariot up to three warriors to cross distances far faster than a man on foot and could be devastating either in a charge or in wheeling about enemy forces. They are however expensive things to build and make and to effectively use them requires a lot of training. Gradually the Temple Guards of previous eras became formalized hereditary classes and eventually these rough institutions became the foundation for the charioteer class. Clad in heavy bronze armor and armed with spear, bow, javelin and (as a new addition) swords the chariot corps that a Kingdom can field can be key to victory, scattering common levies before their wheels and hooves. Even so, the Kings of these early empires are somewhat conservative in how they are used, for the loss of too many of them can mean that it would take decades to recoup their losses.