The Combat Research Upgrade: Demolitions Defense II boosts the Demolitions Defense Rating of the players army and gathering speed for Demolition troops.
| Level | Infantry Defense Boost | Infantry Gather Speed |
|---|---|---|
| 1 | +2% |
+2% |
| 2 | +4% | +4% |
| 3 | +8% | +6% |
| 4 | +14% | +10% |
| 5 | +22% | +16% |
| 6 | +24% | +18% |
| 7 | +26% | +20% |
| 8 | +28% | +24% |
| 9 | +32% | +30% |
| 10 | +36% | +34% |
| 11 | +40% | +40% |