The Storage Pit Upgrades:� Bronze Shield,� Iron Sheild, Metallurgy,� Metalworking, Chain Mail for Archers,� Chain Mail for Cavalry, Chain Mail for Infantry, Leather Armor for Archers,� Leather Armor for Cavalry, Leather Armor for Infantry, Scale Armor for Archers,� Scale Armor for Cavalry, Scale Armor for Infantry, and Toolworking.