Beachhead Studio has confirmed that they will be implementing a roster lock to Clan Wars. The roster lock is there so that during a clan war, adding more members won’t give your clan an unfair advantage.
Beachhead has heard the community concerns and is going to put a roster lock in for the next clan war.
This means that the roster you have the day before a clan war starts will be the roster that is capable of scoring wins for your team; people who join mid-match will still be able to join and play, but their wins will not count towards progress in the war.
Beachhead Studio has not announced the date of the next Clan War; we’ll keep you posted once they do.