Board Thread:Game Discussions/@comment-2601:246:C980:C305:94E:513D:B842:9254-20180911060827/@comment-27862737-20180911135633

Not really the right place to ask (since there aren't a lot of people that actually read this part of the Wiki), but you get recruited. If you score consistently high on the leaderboards with each event (or have a few players who score high in Arena or Heroic consistently, things like that), an alliance rep might reach out to you (usually on Line) and ask you to join their alliance.