In Dawn of Titans the Armory is where you increase the level of the troops you train. Upgrading your Armory allows you to increase the maximum level of your troops.
In the early levels your Armory will allow you to upgrade your human troops; Militia, Archer and Spearmen. Upgrading each level increases the food cost to train your troops, but does not effect training time.
Further in the game you can unlock the Unak Grenadiers, Elithen Pikemen, Ragnar Goliaths, and the Mossmane Panthers. You need to build a race specific Emissary to unlock each troop.
The four Emissary Councils are the Mossmane Cairn, the Ragnar Keep, the Elithen Palace and the Unak Citadel.
You need to upgrade your Emissary and Armory in order to upgrade these race specific troops.
Your Armory requires your Castle and Army Camp, or Barracks to be advanced to a certain level, before you can upgrade this building any further.
The table below has the build cost for each upgrade level, the build time, buildings requirements and the new troop levels unlocked for each upgrade level.
Armory Building Requirements
We will update with accurate figures as we can verify them. Please feel free to leave any details you have from Dawn of Titans by commenting below and we will update the data accordingly.