Free from bias; especially : free from all prejudice and favoritism : eminently fair - an unbiased opinionhaving an expected value equal to a population parameter being estimated - an unbiased estimate of the population mean
I think the best answer is history. The story of the Trojan War is primarily an example mythology where the purpose is for history. Mythology was one means to describe the environment during the ancient times. Myths were used to re-tell historical events.
