Captain America Comics # 1 ( March 1941 ) , going on sale in December 1940 -- a year before the bombing of Pearl Harbor .
Captain America already showing the hero punching Hitler in the jaw -- sold nearly one million copies .
Captain America Comics # 1 ( March 1941 ) , going on sale in December 1940 -- a year before the bombing of Pearl Harbor but already showing the hero punching Hitler in the jaw -- sold nearly one million copies .