Officers can declare war and invite players. The Leader can declare war, invite players and promote, demote, and remove faction members and Officers. There are three ranks in a faction: Leader, Officer, and Member. To do so, there is an 'Invite Players' button in the bottom right corner of your Faction Information screen. Only the Leader and Officers can invite players to be members of a faction. To leave your current faction, click on the 'Leave Faction' button at the bottom of the Faction Information screen. You can request to join multiple factions however you can only be a member of one faction at a time. Keep checking and the name you are looking for will cycle in. The Faction List is only able to display a finite number of factions. What if I do not see the faction I am looking for on the Faction List? Otherwise, you can scroll through the list of available factions and send a request to join.

If you know the invite code of the faction you want to join, you can enter it directly at the top of the Faction List. To join a faction, click on the 'Join Faction' button at the bottom of the first faction screen. If you are already a member of a faction, you must leave it in order to create a new one. To create your own faction, enter a Faction Name and Tag into the allotted spaces under 'Create a Faction' and click 'Submit'.

You can get to the Faction Screen through the in-game Menu.

Hearts of iron 4 leave faction