Writers creating armies should understand the difference between warriors and soldiers. Warriors are the combatants of primitive or nonurbanized cultures and are judged largely on the basis of individual skill and ability. They tend to go into battle in loose mobs or grouped into warbands, and are led by warriors who lead by virtue of strong personality or hereditary status.
Soldiers are the combatants of organized or urbanized societies and are trained to fight in units rather than as individuals. Soldiery draws its strength from numbers and cooperation at every level. Soldiers are organized into units, go into battle in formations and are led by officers that have been appointed over them by the state or promoted based on merit and experience.
Troops can be formed on the battlefield in many ways, and different eras, places and conditions have dictated various ways of doing so. In the classical world, units of troops tended to be drawn up in a straight line, with the strongest unit on the right flank. Infantry typically formed the core of such armies. Units of cavalry were deployed on the flanks to prevent an enemy from surrounding one end of the army. Units of cavalry might be deployed to the rear of the army and deployed as needed once a battle began.
In battle, commanders tried to force the enemy to retreat, rout or surrender…. [but did you try to get one from the Peasants]