An Alliance is an organization created by a Lord like you. You can choose either to join an Alliance or create one. By joining an Alliance you can find like-minded friends to develop and fight together. Your Allies can help you to speed up construction and research. You and your Allies can initiate a War Rally towards strong enemies.

Also you can purchase items in Alliance Store. An Alliance has other benefits like Alliance Researches, Chests, Boosts and Leader Events.