In the Iron Age, you will be able to repair the Alliance Gate (located at the upper left hand of the screen). Once this Alliance Gate has been repaired for 30,000 Food you will be able to join an Alliance.
Being part of an Alliance allows you to chat with other players all over the world and exchange troops to help during Battles. Initially, you will be allowed an Alliance Troop Capacity of 3 only. To increase the troop capacity space, you will have to upgrade the Alliance Gate.
When selecting an Alliance to join, you may click on the Alliance Gate or tap on the Medal icon located at the upper right corner of the screen and choose the Alliance tab. There will be different Alliances available. Some Alliances are open for anyone to just join while some may be available only by invitation. Then there are also some Alliances that list a certain Medal count in order to be part of the Alliance.
Once you are part of an Alliance, you may chat with your members about strategies and almost anything in the game. It is best to pick an Alliance that constantly helps you grow by providing tips and strategies and constantly donates troops to you.
In an Alliance, there are three types of membership available:
Leader - is a person that can change the Alliance’s basic settings like description, minimum medal requirements, invitation settings, etc. The Leader can also kick and promote members.
Council - are members who can promote or kick any ally.
Ally - are regular members of any Alliance.