Take care of your warriors' health and provide them with fresh, quality provisions. If you do, you will have an army with high morale that will be ready to fight an enemy at any time. Conduct this Study to increase your army's health during a defense.
| Level | Food | Lumber | Iron | Stone | Silver | Gold | Time | Requirements | Increased Army Health During Defense | Power | Hero's Experience |
| 1 | 56.5M | 56.5M | 9.4M | 56.5M | 60M | 290K | 9w 1d 00h 00m 00s | 1% | 470K | 205K | |
| 2 | 110M | 110M | 18M | 110M | 115M | 395K | 13w 5d 00h 00m 00s | 4% | 1.1M | 235K | |
| 3 | 205M | 205M | 34M | 205M | 220M | 545K | 20w 4d 00h 00m 00s | 8% | 2.4M | 265K | |
| 4 | 390M | 390M | 64.5M | 390M | 415M | 755K | 30w 6d 00h 00m 00s | 12% | 5.45M | 310K | |
| 5 | 740M | 740M | 125M | 740M | 785M | 1.05M | 46w 2d 00h 00m 00s | 16% | 12.5M | 360K | |
| 6 | 1.4B | 1.4B | 235M | 1.4B | 1.5B | 1.5M | 69w 3d 00h 00m 00s> 1 Year(s) | 21% | 28M | 425K | |
| 7 | 2.7B | 2.7B | 445M | 2.7B | 2.85B | 2.1M | 104w 1d 00h 00m 00s> 1 Year(s) | 27% | 62.5M | 505K | |
| 8 | 5.05B | 5.05B | 845M | 5.05B | 5.4B | 2.95M | 156w 2d 00h 00m 00s> 2 Year(s) | 33% | 145M | 600K | |
| 9 | 9.6B | 9.6B | 1.6B | 9.6B | 10.5B | 4.15M | 234w 3d 00h 00m 00s> 4 Year(s) | 41% | 320M | 715K | |
| 10 | 18.5B | 18.5B | 3.05B | 18.5B | 19.5B | 5.9M | 351w 4d 00h 00m 00s> 6 Year(s) | 50% | 720M | 855K | |
| 38.75B | 38.75B | 6.43B | 38.75B | 41.35B | 19.64M | 1 036w 3d 00h 00m 00s> 19 Year(s) | 50% | 1.3B | 4.48M |
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