Preparation is so important to Clan Wars that we’ve dedicated the first whole day of the war to it. Preparation Day starts as soon as a worthy opponent has been found through the matchmaking system.

To begin with, make sure that your War Base is optimized for defense. Defense is important because the more of a user’s base you destroy, the more stars you get, and only stars count towards victory in Clan Wars. In fact, just knocking down a user’s Town Hall will grant you a one-star victory, so optimize your War Base's layout using the War Base edit tool.  Remember that you can only edit your War Base during Preparation Day. After that, its layout will be locked for Battle Day and saved in the state you left it until your next Preparation Day in your next Clan War.

Your War Base will contain the same buildings as your regular village. However, every time you add a new building to your