In Vikings War of Clans your walls provide protection for your town against incoming attacks.
Each upgrade level increases your total town defense stats. Town defense boosts defense of troops in your town reducing the number of your troops killed, or sent to the infirmary.
Each upgrade level give a 1% bonus to troop defense up to level 20. Level 20 to 21 provides an additional 5% bonus to defense, resulting in a 25% bonus for level 21 walls.
Your walls are a critical building to upgrade, because you cannot advance your Palace and therefore town level, without upgrading your walls first.
You also need to level up your Forge prior to upgrading each level of your walls.
The table below has the build cost for each upgrade level from 1 to 21, the build time (before boosts), buildings required and the influence rewarded.
Walls Building Requirements
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