Blast Furnace
Age Available	Imperial Age
Building	Blacksmith
Cost	275 Food, 225 Gold
Stats	Infantry and Cavalry +2 attack

Blast Furnace is a Blacksmith technology in Age of Empires II. It requires that Forging and Iron Casting both have been researched.Once researched, Infantry and Cavalry have +2 attack. This is the last upgrade to Infantry and Cavalry attack.

Infantry Technologies
Tracking | Squires | Scale Mail Armor | Chain Mail Armor | Plate Mail Armor | Forging | Iron Casting | Blast Furnace

Cavalry Technologies
Husbandry | Bloodlines | Scale Barding Armor | Chain Barding Armor | Plate Barding Armor | Forging | Iron Casting | Blast Furnace