Like it says on the tin.
I'm playing a conventional-start game, and I'm less than 20 years into it and still very primitive in tech. I'm at "Friendly" status with a very advanced race... their ship speeds are around 7500 kps... and we are both at war with a second, less advanced race. The two NPRs fought a big battle in the friendly race's home system, and there are plenty of wrecks of both sides lying around.
Would anybody mind if I salvaged them?