Marvel Comics has become the unquestionable king of the superhero and comic book industry. Established in 1939 as Timely Comics, the company grew throughout the Golden Age and exploded into the mainstream throughout the Silver Age. Here, heroes like Spider-Man, Iron Man, Thor and the X-Men came to embody the company's colorful approach to heroes. However, over eighty years later, many fans still wonder who the company's first hero was — and it isn't who most people think.
Source：https://www.cbr.com/first-superhero-marvel-comics-ka-zar-savage/
