Chainmail is the starting armor of the Viking. It has decent speed with high resistance to slashing and and bludgening damage making it an effective defense against most close-range attacks however it has low resistence agains thrusting damage making it weak against long-range weapons and most mid-range weapons.
Protection
Slashing Resistance
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Piercing Resistance
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Bashing Resistance
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Speed
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Historically chain mail was only used by the wealthy or professional soldiers in Sweden, Norway, Denmark, and in Saxon England. Most Viking raiders used little to no armour.