If you copy it direct it will. I've always found, for the Internet and print, it is best to take notes on your subject from at least 3 sources and then write up from your notes, that way you avoid any plagiarism.
Yes, it will be considered as duplicate content. Even when you republish your own content, which was already published elsewhere, it will be considered duplicate content.
I have found Wikipedia good for inspiration and a direction to take an when writing an article. It is not, however, good as a completely factual research tool. Even my 6th grader is not allowed to use it as a source for her papers.
Use footnotes when doing research. Wise to state where you've got it from. It's totally different if you don't mention the source then that's a different story.
That's when you call it plagiarism.
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.