What is the main problem in the book "The Fighting Ground"?

Jonathan's major conflict is deciding whom to trust, the American soldiers he is with or the Hessian soldiers he meets. Prior to meeting the Hessians, Jonathan has heard terrible stories about them, but once he meets them, he realizes they are good men that he can trust. Jonathan tries to save the Hessians in the end, but he's unable to do so. As Jonathan tries to come to terms with the terrible things he has seen that day, he realizes that men who fight wars are all humans and not necessarily evil. War forces humans to kill other humans, and this is the tragedy of war.