Deployment Defense or Building Defense is a military bonus that deployed units receive when defending buildings from being captured by enemies. The more units are deployed in a building the more effective they defend a building. This causes the first soldiers that defend buildings to resist a lot more enemy units.
The Deployment Defense value scales proportionally to the percentage of units that are deployed in a given building.
Most buildings possess a Deployment Defense scale of 1-10.
Technologies like Invite architects from Europe can expand this scale to 1-15.
Example of units being deployed in a church[]
| Units deployed | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 |
| Units deployed (%) | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% | 100% |
| Deployment Defense | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |