What is avengers vs x men?

Avengers vs X-Men is a 2012 comic book crossover event published by Marvel Comics. It features the two iconic teams of superheroes coming into conflict over the fate of the powerful mutant known as the Phoenix Force. The storyline provides a culmination of several plotlines that have been building up in Marvel's books leading up to the event.

The story sees the mysterious and powerful Phoenix Force returning to Earth, and both the Avengers and X-Men have different plans for how to deal with its arrival. The Avengers want to contain and prevent the Phoenix's destructive tendencies, while the X-Men believe the Phoenix could be harnessed to help rebuild the mutant species.

The conflict escalates into all-out battles between the two teams, with various Marvel characters choosing sides and getting involved in the conflict. This includes characters like Iron Man, Captain America, Wolverine, Cyclops, and Emma Frost.

The story received widespread critical acclaim, and it had a significant impact on the Marvel Universe, leading to several status quo changes and new story arcs. Some of the story's lasting effects were the transformation of Cyclops into a more militant leader and the creation of new mutants.