What are clan wars? How do they work?

A clan war is a strategic battle between two clans. There are two phases in a clan war, the preparation day and the battle day. Each participant can attack twice during the battle day. At the end of the war, the clan that earns the most stars from attacking wins the clan war.

Every clan member who makes successful attacks during a clan war will earn some bonus loot, but only the winning clan will receive a large loot bonus. Clan wars are free to start and participate in, and, unlike normal multiplayer battles, clans get to choose if and when they would like to go to war. Clans do not have to participate in clan wars.

New concept when talking about Clan Wars: WAR BASE means your home on war map. The war base is not the village. The war base is your home in the war map, and the village is your home in the normal game. For example, your village does not get locked during battle day, but your war base does. You do not donate troops to friendly villages during preparation day, you donate troops to friendly war bases. You do not defeat enemy villages in war, but you do defeat enemy war bases, etc. etc.