It can be either, depending on its usage... in most cases however, it is an action verb, even if it is in a progressive tense... e.g. "She was caused to school by her plantation owner when her first year of ownership had come caught by a suprise Negroe teacher at the local school" (yes, they used to write that way. ) In this case, "caused" would be an action verb in a past progressive tense Note: I don't intend to offend anyone by this writing... I am simply trying to convey an example of the word "caused" in a past-progressive tense, in a style of writing that had been used in previous eras. Past progressive tenses are not as commonly used in the modern age of writing as they had been in previous eras.
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.