
Advance
Ordnance Surveys
Comprehensive mapping and logistical integration link every fortress into a coherent defensive system; an achievement of bureaucracy, science, and state power working in unison.
FortressAdvancerequiresAdvance tree
Levée en Masse
Long Rifle Hunting
Fortress
Ordnance Surveys
Grenzer Infantry Only some countries
Grenzhussar Only some countries
Fort Limit+10%
Requires 1
FortressRevolutionsRequires
Belongs to 1
RevolutionsAge
Required by 2
Grenzer InfantryRevolutionsRequires
GrenzhussarRevolutionsRequires
icon = defensive_mentality