Captain America is one of the true icons of comicbooks and one of the most immediately recognizable characters of all time. As a symbol of Marvel Comics, he is barely behind Spider-Man and Wolverine and is at least up there with Iron Man and Thor in that Holy Avengers Triumverate, but Cap is made moreso by the fact that his existence actually predates Marvel Comics itself by twenty full years. Yes, Steve Rogers debuted in 1941 way back when “Marvel” was known as “Timely”.
You know the story. Scrawny soldier undergoes supersoldier serum to become the sentinel of lieberty alongside his youthful sidekick James “Bucky” Barnes before their plane goes down in icy waters and Bucky is killed and Captain America frozen and preserved in a big honkin’ block of ice until his thaw-out to just in time to join the Avengers.