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Just saw this one for the first time:
1 × rollback war
(for this question's revisions)
Its obvious what this flag means (multiple rollbacks have occurred, possibly by different users), but what exactly are the conditions under which this flag appears?
Additionally, what action could/should be taken on this flag?
I see this related question and this one (heck, there's a whole rollback-wars tag), but there isn't any indication as to how the feature was actually implemented.
In the question you linked, two rollbacks by the same user triggered the flag.
Moderator action is taken if, when the moderator reviews the edit history, it is apparent that two or more users are engaged in repeated rollbacks in an attempt to claim their own edited version of the post.
Moderator action can include an additional roll-back to the version the moderator deems the best one, locking the post for a short time to prevent further rollbacks, and suspension of users if the behavior is especially egregious or disruptive.
Rollback wars most commonly occur when a new user doesn't understand this part of the faq, or someone is changing the meaning of a post.
