| “ | Patrol: Dispatch a handful of Pikemen to chase away enemy cavalry! | ” |
| —In-game description | ||
Patrol is a technology in Age of Empires III: Definitive Edition that can be researched at Town Centers, Outposts, Blockhouses, and Forts by the United States in the Commerce Age through the "Spanish Immigrants" Home City Card. Once researched, 6 Tercios spawn at corresponding buildings.
Unlike other technologies, Patrol is available at every corresponding building the player has and can be repeatedly researched, but with a cooldown of 160 seconds that is shared across all structures with Patrol and Levy/Conscription.
See also[]
| Town Center technologies | |
|---|---|
| Asians |   Sentry Uprising ·   Town Defense ·   Sentry Revolt ·   City Defense |
| Europeans |  Levy ·  Conscription |
 Ethiopians |  Kebele Chitet ·  Woreda Chitet |
 Hausa |  Songhai Raid |
 Ottomans |  Levy ·  City Defense |
 United States |  Levy · Conscription ·  Patrol |