Combat Mechanics

Attack Types Plasma (Standard Range Unit) Plasma attacks deal bonus damage vs Unarmoured and Light Armour.Plasma attacks deal reduced damage vs Heavy and Fortified Armour. Explosive (Most Artillery) Explosive attacks deal bonus damage vs Unarmoured, Medium Armour, Heavy Armour, Fortified Armour, Mech Armour

AP  [Armour Units]AP attacks deal bonus damage vs Heavy and Fortified Armour. AP deals reduced damage vs Light Armour and Medium Armour.

Projectile [Snipers, Light Recon, Light Vehicles]  Projectile attacks deal bonus vs Unarmoured, Light Armour, Medium Armour.Deals reduced damage vs Fortified Armour, Mech Armour

Destruction

Destruction damage deals bonus vs all except medium.

AA

AA attacks deal bonus vs heavy armour.ViciousVicious attacks deal bonus vs Unarmoured, Light, Medium Armour, Mech Armour.Vicious attacks deal reduced damage to Fortified Armour, Heavy Armour,Weapon Types

Normal

Missile

Artillery

'Instant

Armor Types'

Unarmored (Few beginning units) Unarmoured armour is mostly used by workers and some basic militia. Light (Recon Units) Recon units normally have light armour.

Medium (Standard Infantry have Medium Armour) Light - Medium Vehicles also have medium armour.

Heavy (Heavily Armoured Infantry) Heavy Armour is a rare armour type used mostly by elite infantry or Iieviun troops. It is also used by aircraft.

Mech Armour-

Used by all armoured vehicles. Reduces damage from most attacks.

Fortified (buildings) Used by all building and several heavy vehicles.

Attack Type vs. Armor Type Chart

Damage Reduction or Increases for Armor For positive Armor, damage reduction =((armor)*0.06)/(1+0.06*(armor)) For negative Armor, it is damage increase = 2-0.94^(-armor) since you take more damage for negative armor scores.

Consult this chart* for more information. A Positive Armor of 1 reduces damage by about 5.7%. A negative armor of 10 increases damage by 46.1%. A unit with 20 armor basically has 55% extra hitpoints -- 100 would become effectively 155.