Units DEF V
Increase units' DEF
Max level: 5
Research levels
| Level |  Power |  Food |  Iron |  Coin | Base research time | Requirements |
|---|---|---|---|---|---|---|
| 1 | 7,700 | 8,309,700 | 8,309,700 | 24,929,200 | 11 days 5 hr 30 min |
|
| 2 | 19,900 | 20,940,600 | 20,940,600 | 62,821,700 | 22 days 14 min |
|
| 3 | 35,400 | 34,028,400 | 34,028,400 | 102,085,200 | 37 days 4 hr 42 min |
|
| 4 | 57,900 | 72,310,400 | 72,310,400 | 216,931,200 | 53 days 13 hr 29 min |
|
| 5 | 88,300 | 131,604,900 | 131,604,900 | 394,814,700 | 77 days 3 hr 6 min |
|