I'm an 8th student who has never doen a comparative essay before. I have to compare the lebanese civil war of 1975 from the fictional book I read about it and the research i did about it. The problem is they're the same.

well comparing doesnt necesarily mean that the two subjects have to be different. Not unless your teacher said so.

so just write your paper about the similarities of the two. I don't know any other way to do it