While watching people pick loyalties in Captain America: The Winter Soldier, some (a tiny bit) of the tension gets lost because of an easy litmus test: if Captain America objects to it, it's wrong. Characters who side with Cap (like Black Widow) are good, and those who side against him are bad, because Cap's judgement is incorruptible.
That led me to wonder, has Captain America ever (on his own and free from deception or mind control, etc) gone off the reservation? Has he ever, in the comics or cartoons or anywhere, genuinely been in the wrong on an important issue? I know there have been disagreements and misunderstandings, or "different perspective" sort of things, but has he ever just straight-up been on the wrong side of something?
Superman is featured in many stories in which his "boy scout" tendencies lead him to darker conclusions, like in Injustice: Gods Among Us or A Better World. Does anything like that exist for Cap? Or is he truly a beacon for what's right, always?