Ore is an important resource in The Hobbit: Kingdoms of Middle-earth.
Elven Ore Veins and Dwarven Mines increase the ore production of the city, along with boosts from Research in Smelting which allows you to increase ore production by 10% per level.
By conquering Mountains your ore production increases by 5%*[level of Mountains ] conquered.
Ore is needed for the construction of city buildings, buildings and the training of troops. Ore can be protected from attacks by the Vault.