Warcraft III: The Frozen Throne Walkthrough & Game Guide

III. Armor and Attack/Armor Info
Wacraft III is set up on a system of counters that effect how much damage a unit
does.  This is based on the type of attack the damage doer has, and the type of
armor the unit/building taking damage has. You can tell what type of armor and
attack a unit has by looking at the info next to its portrait or looking through
the unit guide in this FAQ.   Here is a graph showing the % of damage done for
each attack type on each damage type.
             Light    Medium  Heavy Fortified Hero Unarmored
Normal   100      150       100        70         100         100
Pierce     200       75         100     35            50           150
Siege    100        50          100     150         50            150
Magic   125        75         200      35            50           100
Chaos  100         100          100   100        100          100
Spells   100       100           100     100       75         100
Hero   100        100            100      50        100        100

The amount of armor also determines the amount of damage reduction or increase .
To figure out the amount of damage reduced if you have positive armor use the
equation
((armor)*.06/(1+.06 (armor).
For damage increase with negative armor use  the equation
2-.95^(-armor)
if you don't have the math skills for this, you can just look at the chart on
battle.net at the website: www.battle.net/war3/pdf/armorattackdefense.pdf
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