TECHNOLOGY · CIVILIZATION-SPECIFIC
Citadels
Castles gain attack and resist bonus damage.
Overview
Castles gain attack and resist bonus damage.
Effect and affected units
Citadels changes castles +4 pierce attack, +3 attack vs Rams, +3 attack vs Infantry, receive -25% bonus damage. Read the named target carefully: this effect applies only to the units, buildings, or economy described in its entry. This is the main reason to research it; compare the affected units with the army you expect to field.
Research cost and timing
Research is available in Imperial Age at the Castle. The recorded cost is 600 Wood, 300 Gold, and the research time is 50 seconds. Consider whether the upgrade will affect enough units or workers to repay that investment before the match is decided.
Matchup plan: Citadels Persian Castle-line plan
Citadels strengthens Persian Castles, making them more durable against bonus damage and more threatening to nearby units. Use it to reinforce an important Castle network rather than expecting static defenses to stop every siege push Research Citadels when Persian Castles protect a valuable economy, a crossing, or a forward siege position. Place Castles to overlap their fire and cover likely approaches, then garrison ranged units or infantry as appropriate while a mobile force intercepts siege. Use the improved defenses to hold time for the army to regroup or to keep a forward production site alive Trebuchets can still attack from beyond Castle range, and enemy siege will punish an unprotected structure. Do not invest if the opponent can simply change lanes; keep vision and a response army outside the Castle’s firing radius
Effect and research timing
Castles gain attack and resist bonus damage. Effect: Castles +4 pierce attack, +3 attack vs Rams, +3 attack vs Infantry, receive -25% bonus damage. Research becomes available in: Imperial Age; Research at: Castle; Research cost: 600 Wood, 300 Gold; Research time: 50 seconds. This research is restricted to its named civilization, so it is part of that faction’s identity rather than a shared option. Its value depends on which units receive the effect and how often they take part in combat; timing it before a major engagement can improve the whole eligible group.
Research details
- Age
- Imperial Age
- Research building
- Castle
- Research time
- 50 seconds
- Effect
- Castles +4 pierce attack, +3 attack vs Rams, +3 attack vs Infantry, receive -25% bonus damage
Research requirements and effects for this entry.
- Focus
- Unique technology · Persians
- Signature / category
- Unique technology · Persians
- Release / context
- Civilization research
- Region
- Civilization-specific
- Classification
- Unique technologies