I read a science fiction story as teenager, over 20 years ago, these are the details I remember:
- Earth is controlled by an alien race who conquered it.
- The situation is really desperate, the technology gap is huge.
- Earth people became mostly slaves, sending materials to the home planet of the invaders.
- The small resistance group on Earth succeeds to send a nuclear bomb to the invader's home planet, causing them to retreat from Earth after it caused major damage, maybe even destroyed the whole planet in a chain reaction of some kind.
I think this was written by Robert Heinlein, but not sure about it.
Can anyone help me remember what story this might be?