Translations:Controls/209/en
From Ymirheim Wiki
Right-clicking an enemy or pressing F when an enemy is selected as the target initiates the combat: character enters the combat mode, unsheathing its weapon, starts running towards the target until it gets into the attack range, and starts hitting the enemy with the normal attack. Once the character gets in the attack range, it stops automatically following the target, you have to either manually follow the target when it moves away, or initiate the attack again.