Captain America is a fictional character that appears in comic books published by Marvel Comics. The character first appeared in Captain America Comics #1 (March 1941), from Marvel Comics' 1940's predecessor, Timely Comics, and was created by Joe Simon and Jack Kirby. Over the years, an estimated 210 million copies of "Captain " comic books have been sold in a total of 75 countries.
For nearly all of the character's publication history Captain America was the alter ego of Steve Rogers, a sickly young man who was enhanced to the peak of human perfection by an experimental serum in order to aid the United States war effort. Captain America wears a costume that bears an American flag motif, and is armed with an indestructible shield that can be thrown as a weapon.