|Iron Man, Captain America, New Avengers, New Warriors, Fantastic Four, Spider-Man,|
Civil War is a Marvel Comics event/storyline that happened when the United States government to introduced a "Living Weapon of Mass Destruction" registry for all super-powered individuals. All Marvel heroes were divided on the issue, and a "Civil War" ensued.
The event/storyline took place in Earth-616.
Involvement with Spider-Man
Spider-Man was originally on the pro-side of the SRA. For doing so, Iron Man supplied Peter with the Iron Spider suit.
Spider-Man was reluctant to reveal his identity. During a live, nationally televised broadcast, he pulled off his mask and announced, "My name is Peter Parker, and I've been Spider-Man since I was fifteen years old."
Peter was initially totally for Pro-Registration, until when Stark's side ambushed Cap's side. Peter was helping out in the fight and they were actually beating Captain America and the others. But when Stark brought in a clone of Thor, the clone Thor killed Goliath and this caused a deep rift on both sides. After the fight, Peter told Iron Man he thought he knew what he was doing, that no more people would get hurt.
With this being common knowledge, the Chameleon makes a plan to go after Peter Parker and the ones he cares about most.