OAKLAND, Calif. (AP) — Facebook has banned an extremist anti-government network loosely associated with the broader “boogaloo” movement, a slang term supporters use to refer to a second Civil War or a collapse of civilization.

While the “boogaloo'” term has been embraced by white supremacist groups and other far-right extremists, many supporters insist they aren’t racist or truly advocating for violence.

Violent and extremist groups are increasingly turning to encrypted communications networks and fringe social platforms with no content moderation to congregate, which makes them more difficult to track.

It also took down 400 other groups and 100 pages that hosted similar content as the violent network but were maintained by accounts outside of it.

Civil rights groups have called on large advertisers to stop Facebook ad campaigns during July, saying the social network isn’t doing enough to curtail racist and violent content on its platform and several major advertisers have signed on to the boycott.