Protection : For each point of protection, the chance to receive damage is reduced by 10%.
The above quote is from Narwhals AAR and beginners guide which is excellent and highly recommended. Although I suspect the above quote is incorrect. It states that the protection value of a unit reduces damage by 10% for each point of protection. However I have noticed in both AJE and BOR that the most heavily armored troops have low values such as 1 or 0 while lightly or unarmored troops have values of 3 or 4 which doesn't match with the above statement. If the above statement is correct then the 3 or 4 protection value of light troops would mean they suffer less damage from attacks than heavily armored troops. So unless I am missing something, the unit protection values works differently than described above.
So does anyone know exactly how unit protection values function in combat?