Encyclopedia / Eras & research
Eras & research
Research & the 20-project queue
One countrywide queue. Bonuses that carry through the ages.
A completed controlled city can start research. Pay when you queue; projects run sequentially and benefit every controlled city and unit. The queue holds 20 projects including the active project. Support and Heavy training unlock specialists once per country. Other available branches have two upgrades per era. Complete or queue five upgrades to plan an era advance, then queue the next era behind it. Advancing resets the era slots; skipped earlier upgrades stay skipped. Earned bonuses remain. If the research city is lost, work moves to another controlled city or waits until one is available.
- Branch slots
- 2 per era
- Advance gate
- 5 upgrades in the current era
- Base era advance
- 20 seconds of work
- Timing
- Government and simulation pace apply
Reference people: Military. Starting era: Napoleonic. Compare all peoples and eras. Interactive attack previews and films are available in the in-game encyclopedia.