Full details for the Defense technology, from level 1 to level 2.
| Level | Gold | Industry | Energy | Tech | Effet |
|---|---|---|---|---|---|
| L1 | 4500 | 0 | 0 | 0 | \nHeavy Artillery\nTsar Cannon\nSiege Artillery \nField Artillery\nKrupp Cannon\n\n |
| L2 | 30000 | 0 | 0 | 0 | \nHeavy Artillery\nTsar Cannon\nSiege Artillery \nField Artillery\nKrupp Cannon\n\n |