Uses for 280mm Howitzer Artillery I
| Blueprint | Activity | Quantity |
|---|---|---|
 280mm Howitzer Artillery II Blueprint | Manufacturing | 1 |
 Small Artillery Battery Blueprint | Manufacturing | 1 |
| Blueprint | Activity | Quantity |
|---|---|---|
| 280mm Howitzer Artillery II Blueprint | Manufacturing | 1 |
| Small Artillery Battery Blueprint | Manufacturing | 1 |