Spider-Man; Iron Man; Captain America; The Fantastic Four - The Epis Story that Blows the Marel Universe Apart! Iron Man and Captain America: two core members of the Avengers, the world's greatest super hero team. When a tragic battle blows a hole in the city of Stamford, killing hundreds of people, the U.S. government demands that all super heroes unmask and register their powers.To Tony Stark-Iron Man-it's a regrettable but necessary step. To Captain America, it's an unbearable assault on civil liberties. So Begins the Civil War. Based on the Smash - Hit Graphic Novel That has Sold More than Half a Million Copies.