https://www.gamespot.com/articles/e3-2018-for-honors-breach-mode-announced-coming-fo/1100-6459514/

During its E3 press conference, Ubisoft has announced a new 4v4 mode is coming to For Honor this October. It's called Breach Mode, and it will be released in a free update as part of Season 8, alongside a new faction and an as-yet unspecified single-player component.

Breach mode has two teams of four players face off on a new castle map. One team's job is to defend the castle, while the other team tries to break down the gates and kill the king, who's waiting in a courtyard. Each team has its own goals to accomplish during the match and an army of AI-controlled minions helping their cause. Most matches last between 20 and 30 minutes--longer than any existing mode in For Honor.