Pinned to this topic is all the relevant addresses you need
http://wwiiforum.com/index.php?showtopic=82
I guess the best place to start is by asking family members, the events are not too far away that some will still be alive and many will be direct blood relatives.
Once you have this info try to get some photos and then you will be able to pick up some books on particular subject areas.
You will not be able to get service records unless you are immediate next of kin - see the pinned posts.
Regards
Ryan