Fortifications

+15% bunker and tower health per upgrade. Buildings still require human crews. Two upgrades are available in every eligible era. Their bonuses accumulate with upgrades from earlier eras.

Unlocks

Entrenched Warfare

Viewing era

Black Powder

Availability

Locked in the selected era

Illustrated reference

Reference people: Military. Starting era: Napoleonic. Compare all peoples and eras. Interactive attack previews and films are available in the in-game encyclopedia.

Related topics

• Research & the 20-project queue
• Entrenched Warfare
• Crewing defenses
• Legacy defense tower