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From Liquipedia StarCraft Brood War Wiki

Armor is an attribute possessed by every unit and structure with health points. The amount of armor reduces damage from incoming attacks: each point of armor reduces the damage received by one point. Units attacking in volleys, such as the Zealot and the Goliath, have the target's armor applied to each of their attacks.

Units commonly have a base armor ranging from 0 to 3 and gain 1 additional armor for each armor upgrade affecting them. All combat units have at least one armor upgrade affecting them. Buildings commonly have 1 armor.

Protoss Plasma Shields have a separate armor value that applies to them, starting at 0 for all Protoss units and buildings and growing by 1 for every Shield Upgrade.

Armor is commonly notated in the form x (+y), expressing the unit has x base armor, and gains y armor for every armor upgrade affecting the unit.

Upgrades Affecting Armor[edit]





  • Bonus damage from unit attributes such as Biological or Light is applied to an attack before armor.
  • Armor cannot reduce damage below 0.5; every attack deals at least 0.5 damage.
  • Armor does not reduce damage dealt by abilities.