Full details for the Defense technology, from level 1 to level 6.
| Level | Gold | Industry | Energy | Tech | Effet |
|---|---|---|---|---|---|
| L1 | 1200 | 0 | 0 | 0 | \nFrigate\n\nShip of the Line\n\nIronclad\n\n |
| L2 | 3600 | 0 | 0 | 0 | \nFrigate\n\nShip of the Line\n\nIronclad\n\n |
| L3 | 12000 | 0 | 0 | 0 | \nFrigate\n\nShip of the Line\n\nIronclad\n\n |
| L4 | 18000 | 0 | 0 | 0 | \nFrigate\n\nShip of the Line\n\nIronclad\n\n |
| L5 | 24000 | 0 | 0 | 0 | \nFrigate\n\nShip of the Line\n\nIronclad\n\n |
| L6 | 48000 | 0 | 0 | 0 | \nFrigate\n\nShip of the Line\n\nIronclad\n\n |