Emergency Center

When your troops are defeated in battle and the Hospital is full, some of the extra troops are sent to the Emergency Center (also called ICU by some players). The Emergency Center lets you heal these troops so they aren’t lost permanently.

The number of troops you can save depends on the level of your Emergency Center. A higher level means you can save more troops instead of losing them permanently. You can build the Emergency Center once your Headquarters reaches level 22.

Here are some key details about the Emergency Center:

• Fainted Unit Ratio: This determines the percentage of injured troops sent to the Emergency Center when the Hospital is full. It starts at 21%, meaning 21% of your injured troops will go to the Emergency Center, while the remaining 79% will be lost.
• Fainted Unit Capacity: This is the maximum number of troops the Emergency Center can hold. At level 1, it starts with a capacity of 450 troops.
• Rescue Cooldown: After healing troops in the Emergency Center, you must wait for a cooldown period before healing more.

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

Important Notes:

• The upgrade cost shown in the table above is the base value, meaning the actual cost will be slightly lower once research and other bonuses are applied.
• The Fainted Unit Ratio caps at 40%, even at the higher levels available during the Age of Oil.

Level 30 and Higher

After Season 2, your warzone enters the Age of Oil, unlocking the ability to upgrade buildings, including the Emergency Center, beyond level 30. To do this, you must complete the “HQ Expansion” technology in the Tech Center.

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