Bunkers

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Building Network // Active: Bunkers
19 Structures // Scroll →
01 Arms Industry 02 Army Base 03 Air Base 04 Naval Base 05 Recruiting Office 06 Bunkers 07 Hospital 08 Secret Lab 09 Annex City 10 Combat Outpost 11 Mercenary Outpost 12 Local Industry 13 Field Hospital 14 Airfield 15 Pontoons 16 Military Logistics 17 Coastal Battery 18 Observation Station 19 Air Defense
[ Building Network ] // 06 Bunkers ▼
01 // Arms Industry ← 02 // Army Base ← 03 // Air Base ← 04 // Naval Base ← 05 // Recruiting Office ← 06 // Bunkers CURRENT 07 // Hospital → 08 // Secret Lab → 09 // Annex City → 10 // Combat Outpost → 11 // Mercenary Outpost → 12 // Local Industry → 13 // Field Hospital → 14 // Airfield → 15 // Pontoons → 16 // Military Logistics → 17 // Coastal Battery → 18 // Observation Station → 19 // Air Defense →
[ BUILDING DOSSIER // BLDG-A06 ] // URBAN CITADEL DEFENSE NETWORK

UNDERGROUND BUNKERS

Urban fortification infrastructure designed to reduce incoming damage to garrisoned units, increase city morale and protect other city structures and population. Five tiers scale from -33% garrison damage to -82%, while structural health rises from 20 to 125 HP.

← Buildings Database Open Upgrade Matrix ↓
Underground Bunkers
Max Level
Level 5
Max Damage Mitigation
-82%
Max Structural HP
125 HP
Visibility
Hidden From Hostiles
[ OPERATIONAL BLUEPRINT ]
Citadel Defense
Garrison Protection
Incoming damage to garrisoned forces is reduced from -33% at Level 1 to -82% at Level 5.
City Morale
City morale scales from +5% to +50% across the five supplied tiers.
Camouflage Matrix
The source states bunker levels are never revealed on the global theater map to hostile commanders before combat exposes their effect.
[ PREREQUISITES MATRIX ]

Fortification Conditions

01
No Research Requirement
No external research requirement is listed.
02
No Infrastructure Dependency
No prerequisite infrastructure tree is listed.
03
Day 1
Level 1 can be initialized from Day 1 in urban sectors.
04
Protection Scaling
Higher bunker tiers protect increasingly higher-level city structures and population levels.
[ BUNKER CONFIGURATOR ]

Select Underground Bunker Level

Switch between all five source-supported tiers. Damage mitigation, morale, structural HP, maintenance, protection ceilings, build duration and deployment costs update directly from the dossier.
[ ACTIVE CITADEL PROFILE ]
UNDERGROUND BUNKERS // LEVEL 1
BUILD 09:00:00 // GARRISON DAMAGE -33% // CITY MORALE +5% // HP 20 // MAINTENANCE $100/DAY // STRUCTURE PROTECTION UP TO LEVEL 1 // POPULATION PROTECTION UP TO LEVEL 5 // 500 SUPPLIES // 500 COMPONENTS // 750 FUEL // $2,000
ENTRY CITADEL
Garrison Damage
-33%
-33% → -82%
City Morale
+5%
+5% → +50%
Structural HP
20
20 → 125 HP
Maintenance
$100
Per day
Build Time
09H
Supplied build duration
[ UPGRADE MATRIX ]

Underground Bunkers Level 1–5

Level Build Time Garrison Damage City Morale Structural HP Maintenance Structure Protection Population Protection Supplies Components Fuel Money
Level 1 09:00:00 -33% +5% 20 HP $100 / Day Up To Level 1 Up To Level 5 500 500 750 $2,000
Level 2 12:00:00 -43% +10% 40 HP $110 / Day Up To Level 2 Up To Level 6 750 750 1,000 $3,500
Level 3 16:00:00 -56% +20% 75 HP $120 / Day Up To Level 3 Up To Level 8 1,000 1,000 1,250 $5,000
Level 4 26:00:00 -68% +35% 100 HP $130 / Day Up To Level 4 Up To Level 10 1,250 1,250 1,500 $6,500
Level 5 36:00:00 -82% MAX +50% 125 HP $140 / Day Up To Level 5 Up To Level 10 1,500 1,500 1,750 $8,000
[ PROTECTION LADDER ]

Structure & Population Coverage

L1
Initial Fortification
Structures: Up to Level 1
Population: Up to Level 5
L2
Expanded Shelter
Structures: Up to Level 2
Population: Up to Level 6
L3
Hardened Citadel
Structures: Up to Level 3
Population: Up to Level 8
L4
Strategic Fortress
Structures: Up to Level 4
Population: Up to Level 10
L5
Citadel Tier
Structures: Up to Level 5
Population: Up to Level 10
[ STRATEGIC INTELLIGENCE ]

Citadel Doctrine

Hidden Fortification
Bunker levels remain hidden from hostile commanders on the global theater map until an active assault exposes the defensive effect.
Layered Protection
Every tier increases the level of city structures protected, while population protection rises from Level 5 at Bunker L1 to Level 10 at Bunker L4–L5.
Citadel Tier
The supplied tactical note describes Tier 5 as absorbing 82% of incoming orbital, ballistic or conventional payload damage while protecting the garrison and adjacent infrastructure.
Data Separation // Damage Mitigation ≠ Structural HP
Garrison damage reduction, city morale, structural HP, structure-protection ceiling and population-protection ceiling are separate supplied mechanics. Build time, maintenance and deployment cost remain independent values and are not combined into a synthetic fortress score.
Source Note // Hero Copy Mismatch
The source correctly identifies this dossier as Underground Bunkers, code BLDG-A06, and supplies a complete five-tier fortification progression. Its original hero paragraph nevertheless describes single-tier crossing infrastructure, aquatic transit and embarkation / airlift duration. Those statements conflict with the explicit bunker blueprint and are not treated here as bunker mechanics.
[ FORTIFICATION ARCHITECTURE ]

Five Independent Layers

01
Bunker Level
02
Garrison Mitigation
03
Structural HP / Morale
04
Structure / Population Protection
05
Hidden Fortification
[ BUILDING NETWORK // NEXT DOSSIER ]
Hospital
Underground Bunkers defensive intelligence is documented. Continue into recovery infrastructure with Hospital.
Open Hospital →