Civil War was the big comics event around this time, and even made for a pretty wild Captain America movie (with a fairly astounding scheme, which I summed up on MetaFilter) decades later.
The summary of the whole thing is “superheroes can’t agree whether or not vigilantism should be illegal,” conveniently forgetting that vigilantism is illegal. And then they fight a lot.
This was also an ‘event’ notorious for having a zillion special issues and run-up stuff before it actually started.
We couldn’t not do it up.