Full details for the Traction technology, from level 1 to level 4.
Artillery research, the core of siege strategies. "Traction" scales up to level 4. Maximum effect: "Mobility +4". Available from the start of research. Multiplies the output of tier-S artillery generals.
| Level | Gold | Industry | Energy | Tech | Effet |
|---|---|---|---|---|---|
| L1 | 2500 | 500 | 0 | 0 | Mobility +1 |
| L2 | 8750 | 1750 | 0 | 0 | Mobility +2 |
| L3 | 33750 | 6750 | 0 | 0 | Mobility +3 |
| L4 | 117500 | 23500 | 0 | 0 | Mobility +4 |