Research
Defensive Formation IV
CategoryBattle
Queuemain
Tier4
Research levels
| Level | Effects | Prerequisites | Costs | Power | Time |
|---|---|---|---|---|---|
| 1 | Infantry Defense 4% (4) | building: research-center 19；research: reprisal-tactics-iv 1 | Coal × 180000、Iron × 46000、Meat × 930000、Steel × 12000、Wood × 930000 | 18000 | 16h 40m |
| 2 | Infantry Defense 4% (8) | building: research-center 20 | Coal × 220000、Iron × 55000、Meat × 1100000、Steel × 14000、Wood × 1100000 | 18000 | 21h 40m |
| 3 | Infantry Defense 4% (12) | building: research-center 21 | Coal × 260000、Iron × 65000、Meat × 1300000、Steel × 16000、Wood × 1300000 | 18000 | 1d 9h 20m |
| 4 | Infantry Defense 4% (16) | building: research-center 22 | Coal × 330000、Iron × 83000、Meat × 1600000、Steel × 21000、Wood × 1600000 | 18000 | 2d 2h |
| 5 | Infantry Defense 6.5% (22.5) | building: research-center 23 | Coal × 680000、Iron × 170000、Meat × 3400000、Steel × 44000、Wood × 3400000 | 29250 | 5d 5h |