Ace Comics was a comic book series published by David McKay Publications between 1937 and 1949 — starting just before the Golden Age of Comic Books. The title reprinted syndicated newspaper strips owned by King Features Syndicate, following the successful formula of a mix of adventure and humor strips introduced by McKay in their King Comics title in April 1936; some of the strips transferred from King Comics from issue #1. Ace Comics #11, the first appearance of The Phantom, is regarded by many to be a key issue in the history of comics, as it introduced to the comics format one of the first of the costumed heroes, leading to the Golden Age of superheroes in comics.