There's a quote often attributed to Winston Churchill that asserts history is written by the victors.
This idea is what has allowed American students to be universally taught that Christopher Columbus "found" America, despite the millions of people already living here when he arrived. It's allowed Black Americans to be taught that their history begins with the onset of chattel slavery. It's what makes it so hard for people to shed unconscious biases and allow for new perspectives to add color to things they previously took as fact.
Gina Prince-Bythewood's "The Woman King" explores the 1823 conflict between the African kingdom of Dahomey, with its all-female military force, the Agojie, and the wealthy, Western-influenced Oyo Empire. Despite its critical and commercial success — and despite relatively few reputable sources online offering information about the time period and location in which the film is set — a small faction of people on social media have accused the film of historical revisionism.