Full details for the Defense technology, from level 1 to level 4.
| Level | Gold | Industry | Energy | Tech | Effet |
|---|---|---|---|---|---|
| L1 | 1500 | 0 | 0 | 0 | \n\nLight Artillery\n\nRocket Artillery\n\n |
| L2 | 4500 | 0 | 0 | 0 | \n\nLight Artillery\n\nRocket Artillery\n\n |
| L3 | 15000 | 0 | 0 | 0 | \n\nLight Artillery\n\nRocket Artillery\n\n |
| L4 | 30000 | 0 | 0 | 0 | \n\nLight Artillery\n\nRocket Artillery\n\n |