This question already has an answer here:
In my youth I read and enjoyed a SF novel that took place largely on a planet called Ragnarok. I'd like to rediscover it, if I could. Some details I remember:
- Humans are fighting a war with a humanoid non-human species.
- The planet is earth-like, and has seasons.
- The human colonists of the planet arrived there more-or-less accidentally, their ship having been attacked by the antagonists, who were either unaware of their survival or did not care at the time.
- The story takes place on Ragnarok over several generations of descendants of the original colonists; the bulk of the story is how they survived and eventually prospered
- The humans do not have any advanced technology due to the destruction or disablement of their ship; they gradually recreate some basic technology. An important weapon is the semi-automatic crossbow.
- The humans have a hard time surviving -- they can live off the land, but initially not very well
- Eventually the non-human antagonists return to the planet and the colonists' descendants fight them -- and win! And thus acquire the means to leave the planet using the starship of their enemies
ETA: It's a duplicate in the sense that both questions are answered with the same story -- but it's not a duplicate exactly. I'm happy, nevertheless, although marking this a dupe after well over a year seems a tad delayed. No problem.