The Avengers are Marvel's greatest heroes, but that doesn't mean they don't have a dark side. Having been around for over 60 years, many Avengers have made dark choices that will make fans think twice about their adoration for the characters. And we're not talking about 'I was mind controlled into fighting my teammates...'

Here are five Avengers with dark secrets that will change the way you see them. For this list, each entry draws on mainstream canon events that have never been retconned, and we're avoiding obvious entries like Hank Pym striking the Wasp or Iron Man's Negative Zone gulag during Civil War .

5 Thor Worked for the Nazis

As Seen in Invaders #32 by Roy Thomas, Alan Kupperberg, Frank Springer, Carl Gafford and Joe Rosen

thor looking askance

In a reference to t

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