as I understood you, you were asking how a historical account can actually be a metaphor. I gave an example, specifically, the Silmarillion, the Hobbit, and tLotR. They are the history of middle earth, and yet, it's al just a fictional story that can be interpreted as a gigantic metaphor (esp. LotR). Not all historical accounts are fiction, though. One that comes to mind in Thucydides' Peloponessian War.
one problem with your list, the Rise and Fall of the Roman Empire--it is a history of the Roman Empire, which undoubtedly happened (the facts presented in that history may well be wrong, at least some--it's over fifty years, and new research has happened on the subject).
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