There seems to be other settlements, which is a very good thing, since they're no longer alone in a way. Rick's group is running low on food, and therefore, they wanted to trade with another group. The problem with this group is they have a bully, Negan, who keeps taking more and more of their food each time. Rick's group is going to do what they do best--kill their adversary. Jesus's group gets their bully off their backs and Rick's group gets food. Win-win situation right?