Clans are an optional feature in Clash of Clans, but it is strongly recommended that every player should join a Clan. Collaboration is a very important and helpful aspect of this game. Clans are groups of players that join together in order to compete with other Clans in two ways: the first is to pool their trophies and battle to collect the most trophies, and the second is to win Clan Wars

Roster and war size By default, all Clan members are in the roster for Clan War Leagues. The roster represents the pool of players who can participate in the Wars of the Season and gain rewards. Each Season Clans can choose from two war sizes: 15vs15 and 30vs30. In Champion league, only the war size 15vs15 is available.

CYRILBARRE. • 3 yr. ago. It is most likely determined by the first the length and then the character of your profile tag. I've been playing in a max TH9 clan only for a long time and I will always be the top base on the war map, because I play Clash since release. Since my account is so old my profile tag is one character shorter than all the
Clan Wars is a new feature of Clash of Clans. The feature allows clans to declare war on other clans. Once a war is declared and accepted, the clans will battle to see which clan is the better clan. How does it work? The mechanics of clan wars are actually very simple.
You get two chances to attack two different bases. The troops you build in your normal base will be used to attack in the Clan War. Make sure your Heroes are at full health before attacking so they can be used during the Clan War attack. Your Clan Castle is automatically recharged with donated troops between attacks.
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