You can do this by visiting your Player Profile and clicking the 'Clan Wars' button and it will ask you if you prefer to be in the war or not.

If you wish to not participate in a Clan War you can opt-out.

The members that will go to war are determined by the leader or co-leader who starts the war search, the leader or co-leader chooses the players that will participate among all those members who opt in for Clan Wars.

There are eight different sizes of Clan Wars, starting from 5 vs 5 and can be increased in multiples of five up to 50 vs 50, the exceptions being 35 vs 35 and 45 vs 45 (both of these sizes can be chosen in Friendly Wars).

However, the ability to search for regular Clan Wars is temporarily disabled during the Clan War Leagues sign-up period. A Clan war search can be started as long as the clan is not currently in a war, whether it be a normal Clan War, a Friendly War, or a war in Clan War Leagues.

Strength calculations have been updated in Clan Wars matchmaking to compensate for high level walls and heroes, skeleton traps, etc.

Experience level of members, number of trophies, number of wars won by a clan and clan level will not influence the matchmaking process whatsoever.

While the Clan War search is ongoing, Co-Leaders or Leaders can cancel the war search at any time, but once a match is found, canceling the war can no longer be done and the war enters its preparation day.

Once a Co-Leader or Leader starts a Clan war search, the clan is put into the matchmaking pool, and it may take anywhere from a few minutes to a few hours for the matchmaking process to find a suitable clan in war.

The matchmaking system in Clan Wars puts your clan against another clan of similar strength both offensively and defensively, and of the same size, rounded down to multiples of five (or ten if member amount is 30+) eligible members.

The bonus can be increased by winning attacks, but most of it is lost if your clan loses the war. Bonus loot is your prize for winning the war.

Each epic 47 hour event (23 hour preparation + 24 hour battle day) is won by the clan who scores more stars.

Clan Wars is a feature that was added in the Version 6.56.1 update.

Clan war mod