What if Fiction Wasn't Fictional?

What if what we know as fiction are true tales that bleed through from another universe?

What would readers in that universe make of a series of stories where, in a time span of a little more than a century, two different nations are taken over by corporals*, each of whom try to conquer the known world and each of whom has their aspirations dashed to pieces on the steppes of the same country?

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*Yes, I know that "the little corporal" was a nickname. Sue me.