The effects of Nuclear Weapons on a target country are:
- Stability lowerd drasticly (For both countrys involved)
- Military Units Killed
- Production harmed by civillian deaths
Note: Invading a nuclear power could trigger a nuclear first strike. Also the defender maintains control of all his nukes, even the ones in territory under military control of the invader. Even if the defender's country is totally overrun, he can still nuke the invader's homeland.