"Wall hitpoints increased."—In-game description
Bastion is a technology in Age of Empires III that can be researched once the Colonial Age is reached at a Wall, while European civilizations can also research it at the Church (Mosque for the Ottomans). Once researched, all Walls get +150% hit points.
Bastion is available to all civilizations except for the Sioux, who cannot build walls in the first place.
|General||Bastion · Mission Fervor · Town Watch · Gas Lighting · Mercantilism · Standing Army · Mass Cavalry|
|Ottomans||Millet System · Koprulu Viziers · Abbasid Market · Galata Tower District · Topkapi · Tanzimat|