Screen: Simply put, it decreases the amount of damage a soldier can take when they are retreating.Pursuit: This is damage but for the retreating phase, when the battle is over the pursuit stat is added on top of the damage to deal more damage to retreating enemies.Toughness: The basic defence stat, when toughness reaches 0 for a unit they are dead.Damage: The basic attack stat, attack modified by various factors such as terrain and commander ability then the damage is dealt against the enemies toughness.It breaks down each category of combat and attempts to explain how they function. This guide is meant to help players understand the combat in CK3 from the basics to the semi-advanced.