This article is about the technology in Age of Empires III. For other uses of the term, see Spies.

Spies is a technology in Age of Empires III, available in the Imperial Age. It costs 75 coin per enemy unit, and lets the player see everything that their enemies see.

It can be researched from the Capitol for European civilizations, and from the Town Center for Asians and Native Americans.

Capitol technologies
Blockade | Spies | Knighthood | Peerage | Immigrants | Large Scale Agriculture | Deforestation | Excessive Taxation | Legendary Native Warriors