Tubman was almost entirely fake and her mythos crafted by a Marxist named Earl Conrad (Cohen) in early 1940s who hated white people. With no primary sources and almost none of the stories promoted about her can be corroborated.

(other redditors call out this misinformation)

Harriet Tubman didn't exist, at least not in the hagiography we get from black supremacists. There's virtually no scholarship or primary sources about her life until around 1970, and almost none of the stories promoted about her can be corroborated.