The most usual way to win Victory Points is by destroying, routing or significantly reducing the fighting strength of enemy units:
Each enemy unit that has been destroyed or that has fled off the battlefield is worth a number of Victory Points equal to 100% of its points cost.
Each enemy unit that is fleeing at the end of the battle is worth a number of Victory Points equal to 50% of its points cost (rounding fractions up). For example, a unit that cost your opponent 351 points to field would be worth 176 Victory Points to you if it is fleeing when the battle ends.
Each enemy unit that has been reduced to less than 25% of its starting Unit Strength at the end of the battle is worth a number of Victory Points equal to 25% of its points cost (rounding fractions up).