Are those person possessed just hallucinating or were there unseen individuals controlling them?

It is their minds playing games on them. Possession is a joke and anyone who believes it is real is fooling themselves. Even the catholic church, who loves to act like exorcism works , has no real proof of possession.

Possession is a form of energy connected to this world but present in a form we can not normally see - when a person is possessed they are co-inhabited by another energy, fo what reason I don't know.

No but those persons must be hallucinating if they seem possessed as some times our imagination can play tricks on their minds and make them think they are seeing things which aren't there or a way of thinking that isn't 'real'.

Such people should seek treatment or their imaginings may worsen and could affect their thinking considerably.

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.