Terminus Group

The hostile group inhabitting Terminus served as the main antagonists in the finale of season 4 and the first 3 episodes of Season 5 in AMC's The Walking Dead.

They were originally survivors willing to help others, until they were brutalized a by a hostile group, after which they became amoral cannibals who seek to either recruit or consume all survivors they encounter.

Founding
Terminus was originaly founded after the apocalypse as a sanctuary, putting up signs and even sending signals via radio. It was run by Gareth, Mary, Alex and several other survivors during those times.

Occupation
At some point a hostile group took over Terminus, locking up the original inhabitants, torturing the men and raping the women. Over time Gareth, after witnessing his mother be raped several times, became disillusioned with the world, deciding that he and others would either be "the butcher or the cattle".

The residents of Terminus eventually rose up against their tormentors, killing and eating them, save for the leader who was locked up as punishment.

A shrine was built for those who had perished during the occupation.

The new Terminus
It was decided that all future new-comers to the Sanctuary would either join the group or be slaughtered like cattle and consumed. Even dead residents would be carved up, as not to waste meat.

Rick's arrival and Terminus' destruction
TBA

The Hunters and the final end
TBA

Trivia

 * The TV show's counterpart to The Hunters from the comics.