Legal answeryes, you can take him to court and file suit. If his signature is valid, he will be responsible for paying the debt. If the judge finds in your behalf, he will have a judgment against him.
This will not affect his credit, so if can't pay it, you will never get the money. He has a 10 year cap to pay, and in that time you can have his wages garnished if you can find his employer (granted he has a job and is not working for cash unrecorded).
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.