Age of Empires Series Wiki

Hand Infantry, Shock Infantry[sic] and Foot Archer hitpoints increased.
—In-game description

Infantry Breastplate is a technology in Age of Empires III that can be researched by European civilizations at the Arsenal; Haudenosaunee and Lakota can also research it at the Longhouse and the Teepee respectively once the New Ways Home City Card has been sent. Once researched, it increases the hit points of hand infantry and foot archers by 10%.


3Icon48px Age of Empires III[]

  • Infantry Breastplate costs 200 wood, 200 coin, increases the hit points of archers, and the in-game description is "Archer and hand infantry hitpoints increased."

Age3DE Icon Definitive Edition[]

  • Infantry Breastplate costs 100 wood, 100 coin.
  • With update 23511, Infantry Breastplate increases the hit points of foot archers and the in-game description is "Hand Infantry, Shock Infantry and Foot Archer hitpoints increased."


  • Although the in-game description since update 23511 says that the technology affects shock infantry units, it actually does not affect all shock infantry units, since the technology affects hand infantry and foot archers and only hand shock infantry units have the hand infantry tag.
Arsenal technologies
InfantryInfantry Breastplate · Counter Infantry Rifling · Socket Bayonet · Flint LockA · Paper CartridgeA · Military DrummersA
CavalryCavalry Cuirass · Ranged Cavalry Caracole · PillageA
ArtilleryGunner's Quadrant · Heated Shot · Professional GunnersA · TrunionA · Incendiary GrenadesG
A requires the Advanced Arsenal Home City Card
G only available to civilizations with Grenadiers