The X-Men vs. The Avengers # 1 (of 4) April 1987 VF+ Marvel Comics

The Avengers, led by Captain America, decide that Magneto must face trial before the World Court. They believe justice must be served regardless of his status as a mutant or former enemy. However, the X-Men see things differently. Having watched Magneto evolve from villain to reluctant ally and protector of mutantkind, they refuse to simply hand him over.