Redoubts
Redoubts is an Age of Empires III technology available to Federal Americans from the Fortress Age, researched at Wall; Meeting House (United States) ; Cathedral (Mexicans). It increases wall cost -20%, hit points by 400%.

Research profile
- Age
- Fortress Age
- Civilization
- Federal Americans
- Research location
- Wall; Meeting House (United States) ; Cathedral (Mexicans)
- Research time
- 60 seconds
- Wood cost
- 600
- Coin cost
- 600
- Effect
- Wall cost -20%, hit points +400%, but build time +70%
Effect & research conditions
Available to Federal Americans from the Fortress Age. Research it at Wall, Meeting House (United States), or Cathedral (Mexicans). Effect: Wall cost -20%, hit points +400%, but build time +70%. Research costs 600 wood, 600 coin. Research takes 60 seconds.
Research condition
Available to Federal Americans from the Fortress Age. Research it at Wall, Meeting House (United States), or Cathedral (Mexicans).
When to research
Redoubts makes walls much harder to destroy and 20% cheaper, but its 70% build-time increase means it is a preparation choice rather than an emergency defense. Research before laying a long wall or protecting a planned choke; the 600 Wood, 600 Coin and 60 seconds compete with immediate units. Use it when the map gives workers time to complete the fortified line.
A stronger but slower wall line
Redoubts is a Fortress Age Federal American technology researched at a Wall, the United States Meeting House or the Mexican Cathedral. It costs 600 Wood and 600 Coin and takes 60 seconds. It reduces Wall cost by 20%, increases Wall hit points by 400% and increases construction time by 70%.
Start construction before pressure arrives
The added durability can protect a planned defensive perimeter, but the longer build time makes late emergency walls less effective. Research when there is time to construct and defend the line. The discount helps with the resource cost, while the delay still requires builders and protection.