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| Building Details | |
|---|---|
| Item Type | Building |
| Unlock Requirement | Headquarters Level 22 |
| Function | Stores “fainted units”—injured troops from World Map battles when your Hospital is at full capacity. |
| Capacity | Ability to store 450 troops at level 1, increasing with each upgrade. |
Last War Survival Emergency Center Guide: Introduction
The Last War Survival Emergency Center, or ICU, unlocks at Headquarters level 22 and plays a crucial role in reducing troop losses. When your Hospital is full, “fainted units”—troops that would normally die—are instead rescued and held in the Last War Survival Emergency Center. This preservation offers a major advantage in battle-heavy stages. However, its long cooldown between rescues can be frustrating, making it a strategic building with both benefits and drawbacks.
Last War Survival Emergency Center Guide: Emergency Center Mechanics
The Last War Survival Emergency Center functions as a safety net for your troops when your Hospital reaches its maximum capacity. Instead of suffering permanent losses, a portion of your injured troops are sent to the Emergency Center as “fainted units,” awaiting rescue. Several key mechanics govern the Last War Survival Emergency Center’s operation:
Fainted Units: When your Hospital is full and you engage in a battle on the World Map, a portion of your injured troops become “fainted units” and are transferred to the Last War Survival Emergency Center. This mechanic only applies to World Map battles; battles in other areas like the Desert Battlefield or Winter Battlefield do not result in fainted units.
| Features | Description |
|---|---|
| Fainted Unit Ratio | Determines the percentage of injured troops saved in the Emergency Center. Starts at 21% and can be increased to a maximum of 40% via upgrades. |
| Fainted Unit Capacity | Limits the number of fainted units the Emergency Center can hold. Starts at 450 troops at level 1 and increases with each upgrade. |
| Rescue Cooldown | After each rescue, there’s a cooldown—starting at 2 days and 12 hours. Upgrades and alliance help can reduce this cooldown. |
Important Note: You cannot use speed-ups or Diamonds to reduce the rescue time.
Last War Survival Emergency Center Guide: Upgrading the Emergency Center Costs and Benefits
Upgrading the Last War Survival Emergency Center is essential to maximize its effectiveness in preserving your troops. Each upgrade enhances three key aspects of the building:
| Benefit | Description |
|---|---|
| Increased Wounded Capacity | Each upgrade increases the number of troops that can be treated, helping you retain more soldiers after battles. |
| Faster Healing Speeds | Higher levels unlock faster recovery times, reducing troop downtime and keeping your army ready for the next fight. |
| Lower Healing Costs | Upgrades can lower the resource cost of healing troops, especially when combined with research and power-ups. |
| Improved Efficiency During Events | A high-level Emergency Center helps you recover faster during PvP, alliance wars, and events—giving you a key advantage in sustained conflicts. |
Costs of Upgrading
| Cost Type | Description |
|---|---|
| Resources | Each level requires more wood, food, metal, and fuel. Higher levels may also demand rare materials or special upgrade items. |
| Time | Upgrade times increase with each level. Without speed-ups or alliance assistance, higher-level upgrades can take several hours or days. |
| Prerequisites | Certain levels require other buildings (like Headquarters) to be upgraded first, often creating a chain of progression. |
| Builder Availability | Only one building can be upgraded at a time unless extra builder slots are unlocked—this can slow your overall base development. |
Level 1 to 30 Emergency Center Upgrade Details
| Level | Iron | Food | Coin | Upgrade Time (Approx.) | Fainted Unit Ratio | Fainted Unit Capacity | Rescue Cooldown | Power |
|---|---|---|---|---|---|---|---|---|
| 1 | 10 | 10 | – | 1s | 21% | 450 | 2d 12h | 500 |
| 2 | 150 | 150 | – | 12s | 22% | 500 | 2d 12h | 1,000 |
| 3 | 680 | 680 | – | 47s | 23% | 550 | 2d 12h | 1,500 |
| 4 | 1,700 | 1,700 | – | 1m 57s | 24% | 600 | 2d 12h | 2,000 |
| 5 | 14,000 | 14,000 | – | 11m 42s | 25% | 650 | 2d 10h | 2,500 |
| 6 | 61,000 | 61,000 | – | 35m 6s | 26% | 700 | 2d 10h | 3,000 |
| 7 | 120,000 | 120,000 | – | 1h 10m 12s | 27% | 750 | 2d 10h | 3,500 |
| 8 | 190,000 | 190,000 | – | 2h 20m 24s | 28% | 800 | 2d 10h | 4,200 |
| 9 | 310,000 | 310,000 | 50,000 | 3h 16m 34s | 29% | 850 | 2d 10h | 5,100 |
| 10 | 370,000 | 370,000 | 60,000 | 4h 15m 32s | 30% | 900 | 2d 8h | 6,100 |
| 11 | 930,000 | 930,000 | 160,000 | 5h 32m 12s | 31% | 950 | 2d 8h | 7,600 |
| 12 | 1,600,000 | 1,600,000 | 250,000 | 8h 23m 49s | 32% | 1,000 | 2d 8h | 9,600 |
| 13 | 1,700,000 | 1,700,000 | 280,000 | 9h 21m 24s | 33% | 1,050 | 2d 8h | 11,600 |
| 14 | 2,400,000 | 2,400,000 | 390,000 | 12h 9m 49s | 34% | 1,100 | 2d 8h | 14,000 |
| 15 | 3,400,000 | 3,400,000 | 550,000 | 17h 1m 45s | 35% | 1,150 | 2d 6h | 16,800 |
| 16 | 6,100,000 | 6,100,000 | 970,000 | 23h 50m 27s | 36% | 1,200 | 2d 6h | 20,600 |
| 17 | 7,900,000 | 7,900,000 | 1,300,000 | 1d 9h 22m 37s | 37% | 1,250 | 2d 6h | 24,900 |
| 18 | 14,000,000 | 14,000,000 | 2,200,000 | 1d 22h 43m 40s | 38% | 1,300 | 2d 6h | 30,600 |
| 19 | 17,000,000 | 17,000,000 | 2,700,000 | 2d 17h 25m 7s | 39% | 1,350 | 2d 6h | 36,900 |
| 20 | 30,000,000 | 30,000,000 | 4,800,000 | 3d 19h 35m 10s | 40% | 1,400 | 2d 4h | 45,200 |
| 21 | 42,000,000 | 42,000,000 | 6,700,000 | 4d 23h 3m 45s | 40% | 1,460 | 2d 4h | 55,000 |
| 22 | 54,000,000 | 54,000,000 | 8,700,000 | 6d 10h 46m 49s | 40% | 1,520 | 2d 4h | 66,100 |
| 23 | 68,000,000 | 68,000,000 | 11,000,000 | 8d 9h 12m 52s | 40% | 1,580 | 2d 4h | 78,600 |
| 24 | 85,000,000 | 85,000,000 | 14,000,000 | 11d 17h 42m 1s | 40% | 1,640 | 2d 4h | 92,600 |
| 25 | 140,000,000 | 140,000,000 | 23,000,000 | 16d 10h 22m 49s | 40% | 1,700 | 2d 2h | 110,500 |
| 26 | 200,000,000 | 200,000,000 | 32,000,000 | 23d 7m 56s | 40% | 1,760 | 2d 2h | 131,800 |
| 27 | 260,000,000 | 260,000,000 | 42,000,000 | 32d 4h 59m 7s | 40% | 1,820 | 2d 2h | 156,100 |
| 28 | 370,000,000 | 370,000,000 | 59,000,000 | 45d 2h 10m 45s | 40% | 1,880 | 2d 2h | 185,100 |
| 29 | 520,000,000 | 520,000,000 | 83,000,000 | 63d 13h 55m 43s | 40% | 1,940 | 2d 2h | 219,500 |
| 30 | 720,000,000 | 720,000,000 | 120,000,000 | 88d 3h 6m | 40% | 2,000 | 2d | 260,000 |
Navigating the Upgrade Costs
Upgrading the Last War Survival Emergency Center requires a substantial investment of resources, especially as you reach higher levels. The necessary resources include iron, food, and, at later levels, coins and oil. A comprehensive table detailing the upgrade costs, along with the corresponding Fainted Unit Ratio, Fainted Unit Capacity, and Rescue Cooldown for each level, is available.
Unlocking Higher Levels
Once your warzone enters the Age of Oil after Season 2, you can upgrade the Last War Survival Emergency Center beyond level 30. This advancement requires completing the “HQ Expansion” technology within the Tech Center. The upgrade costs and stats for levels 31 to 35 are available.
Level 31 to 35 Emergency Center Upgrade Details
| Level | Iron | Food | Coin | Oil | Fainted Unit Ratio | Fainted Unit Capacity | Rescue Cooldown | Power |
|---|---|---|---|---|---|---|---|---|
| 31 | 790,000,000 | 790,000,000 | 130,000,000 | 360,000 | 40% | 2,020 | 2d | 302,400 |
| 32 | 870,000,000 | 870,000,000 | 140,000,000 | 576,000 | 40% | 2,040 | 2d | 346,900 |
| 33 | 960,000,000 | 960,000,000 | 150,000,000 | 979,200 | 40% | 2,060 | 2d | 393,500 |
| 34 | 1,000,000,000 | 1,000,000,000 | 160,000,000 | 1,762,560 | 40% | 2,080 | 2d | 441,200 |
| 35 | 1,100,000,000 | 1,100,000,000 | 170,000,000 | 3,525,120 | 40% | 2,100 | 1d 22h | 491,100 |
Balancing Costs and Benefits
While the Last War Survival Emergency Center can be a valuable asset, consider its upgrade costs against other priorities in your base development.
Prioritize upgrading the Emergency Center if you frequently engage in battles with significant troop losses or are preparing for events like server wars.
If resources are limited, it might be more strategic to allocate them to other essential buildings or research upgrades initially and upgrade the Last War Survival Emergency Center as resources allow.
Last War Survival Emergency Center Guide: Tips and Tricks
Strategic Upgrading
Prioritize upgrading your Last War Survival Emergency Center if you frequently engage in battles with high troop casualties or anticipate events like server wars where significant losses are likely. Upgrading increases the percentage of injured troops saved, expands the holding capacity for fainted units, and reduces the cooldown period between rescues. However, carefully consider the resource cost of upgrades against other essential buildings or technology advancements.
Leveraging Alliance Support
Coordinate with your alliance members to send help, which reduces the rescue cooldown time. It’s best to request assistance when many alliance members are online, such as during Alliance Exercise or other events where members are actively participating.
Managing Drill Ground Space
If your Drill Ground is full and you can’t immediately accommodate rescued troops, don’t claim them from the Last War Survival Emergency Center right away. Leave them pending until you have space in your Drill Ground or the two-day cooldown timer for the next rescue is close to expiring. This strategic approach prevents unnecessary delays in subsequent rescues while efficiently managing your Drill Ground capacity.
Alternative Troop Generation
If your troop count is low, consider training level 1 soldiers. Training these lower-level troops is quick and can help fill out your squads while you wait for higher-level troops to be rescued from the Emergency Center.
By strategically upgrading and employing these tips, you can effectively utilize the Emergency Center to maintain a robust army in Last War Survival.
Last War Survival Emergency Center Guide: Conclusion
The Last War Survival Emergency Center is essential for sustaining your forces. Its upgrades—boosting Fainted Unit Ratio, capacity, and reducing cooldown—offer immense value despite high costs. With smart strategies like alliance support and efficient troop management, it becomes a powerhouse for long-term survival. More than a building, it’s your frontline defense against attrition in an unforgiving war zone.
Frequently Asked Questions (F.A.Q)
❓How does the Emergency Center work?
When your Hospital is full and you engage in a battle on the World Map, a portion of your injured troops become “fainted units” and are transferred to the Emergency Center. This mechanic only applies to World Map battles; battles in other areas like the Desert Battlefield or Winter Battlefield do not result in fainted units.
❓Are rescued troops returned at full strength?
Yes, once rescued, your troops are fully restored and ready for combat again. You can manually rescue them or let them auto-rescue when the cooldown resets.
❓Can I recover all my wounded troops?
No, only a percentage (based on your Fainted Unit Ratio and capacity) can be recovered. Excess troops beyond this limit are lost, so upgrading is key to minimizing permanent losses.
❓What happens if I don’t rescue my troops right away?
Rescued troops can remain in a pending state. Strategically delaying collection helps you manage Drill Ground space and prepare for the right moment to reintegrate them into your army.
❓Is upgrading the Emergency Center worth it?
Absolutely. It reduces losses during major battles and events, making it one of the most important buildings for long-term military sustainability and power growth.
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