Civil War is a 2006-2007 Marvel Comics crossover event built around a seven-issue limited series of the same name written by Mark Millar, and penciled by Steve McNiven. The storyline builds upon the events that developed in previous Marvel crossovers, particularly Avengers Disassembled, House of M, Decimation, and Secret War.
The tagline for the series is Whose Side Are You On?.
The premise of the Civil War storyline involves the introduction of a Superhuman Registration Act in the United States. Similar acts have been used as literary devices in Watchmen, Uncanny X-Men, DC: The New Frontier, Powers, Astro City, and The Incredibles, though never on a scale such as permanently altering an entire pantheon of established pop culture icons. Mark Millar, writer for the story, has said:
The act requires any person in the United States with superhuman abilities to register with the federal government, reveal his/her true identity to the authorities, and undergo proper training. Those who...
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