Survival

These three stories are about surviving.
The first story is about a man who crashes and is the lone survivor of his ship on a hostile planet. He has to figure out how to survive using what remains of his ship against carnivorous creatures, the elements, and humans whom he cannot understand.
The second story is about a pilot who has had enough of Space Fleet and decides to return home. Upon his return to his home planet, he finds that it could be more hazardous than the war he had just left.
The third story is about several men in the Federation Army who are taken prisoner and how they survive to escape.