Custom battles are a feature available only in Mount&Blade: Warband. You have access to armies of factions (including outlaws) of up to 200 men (25 trial) and several characters. There are 3 sliders that change the percentage of troops of each type (cavalry, infantry, archers).
Heroes or companions are unique troops with individual names, stories, skills, attributes, and equipment (all of which can be chosen by you). Like the player character, heroes never die and are only knocked unconscious. You can never station them in garrisons.
Mount&Blade: Warband is a stand-alone expansion pack for its predecessor, the action role-playing video game Mount&Blade. The game was developed by TaleWorlds and was published by Paradox Interactive on March 30, 2010.